Ai làm được thì giúp tớ với ( Cảm ơn nhìu lắm :))) Bài này là biến đổi từ thành 1 tính từ 'positive' hay 'negative'Perhaps the most_____(use) an convenient of all domestic appliances in the microwave...

Perhaps the most useful (use) an convenient of all domestic appliances in the microwave oven. You do not need to be a skillfull (skill) cook or a technologic (technology) geniusto operate one, and you can produce extremely tasty (taste) meals at the touch of a button. Many of us would now feel rather helpful (help) and unable to cope without one. The man we have to thank for this modern cooking miracle is (invite), Percy LeBaron Spencer, who manufactured the Radar Range oven for industrial use in 1945. Ten years later (late) the first domestic microwave made its appearance (appear). This rather bulky contraption needed an electrician (electric) and a plumber to install it and was the same size as a fridge. At over $1,000 in 1955, it was not immediately successful (succeed). Not until 1967, when the countertop model became widely (wide) available, did sales start to improve.Câu trả lời: Perhaps the most useful (use) an convenient of all domestic appliances in the microwave oven. You do not need to be a skillfull (skill) cook or a technologic (technology) geniusto operate one, and you can produce extremely tasty (taste) meals at the touch of a button. Many of us would now feel rather helpful (help) and unable to cope without one. The man we have to thank for this modern cooking miracle is (invite), Percy LeBaron Spencer, who manufactured the Radar Range oven for industrial use in 1945. Ten years later (late) the first domestic microwave made its appearance (appear). This rather bulky contraption needed an electrician (electric) and a plumber to install it and was the same size as a fridge. At over $1,000 in 1955, it was not immediately successful (succeed). Not until 1967, when the countertop model became widely (wide) available, did sales start to improve.

Ai làm được thì giúp tớ với ( Cảm ơn nhìu lắm :))) Bài này là biến đổi từ thành 1 tính từ 'positive' hay 'negative'Perha...

Hãy tham gia nhóm Học sinh Hoc24OLM

ngô mai phương

21 tháng 2 2020 lúc 20:51

IV. In the following text, six sentences or parts of sentences have been removed. Above the extract you will find the six removed sentences PLUS one sentence which doesn't fit. Choose from the sentences (A-G) the one which fits each gap (1-6). Remember, there is one extra sentence you do not need to use. Write the correct letter in the box. Choose from the following sentences to fill the spaces in the text. There is ONE extra. A. Using a microwave for cooking a large food mass is difficult d...

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IV. In the following text, six sentences or parts of sentences have been removed. Above
the extract you will find the six removed sentences PLUS one sentence which doesn't fit.
Choose from the sentences (A-G) the one which fits each gap (1-6). Remember, there is
one extra sentence you do not need to use. Write the correct letter in the box.
Choose from the following sentences to fill the spaces in the text. There is ONE extra.
A. Using a microwave for cooking a large food mass is difficult due to limited penetration of
microwaves.
B. This can be overcome by leaving the food to stand for a few minutes when cooking is
completed.

C. It is advised that the water should be poured slowly into another container that already
contains the powder.
D. In this way, buying a microwave oven with a turntable ensure the food is cooked
throughout.
E. Conversely the microwaves do not heat glass, ceramic and plastic containers.
F. If the microwaves are not absorbed inside the oven, the oven can be damaged by
electrical arcs and overheating of the microwave source.
G. When water in that state is disturbed, it can suddenly and unexpectedly boil violently.

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Lớp 8 Tiếng anh Luyện tập tổng hợp

ngô mai phương

21 tháng 2 2020 lúc 20:58

IV. In the following text, six sentences or parts of sentences have been removed. Above the extract you will find the six removed sentences PLUS one sentence which doesn't fit. Choose from the sentences (A-G) the one which fits each gap (1-6). Remember, there is one extra sentence you do not need to use. Write the correct letter in the box. Choose from the following sentences to fill the spaces in the text. There is ONE extra. A. Using a microwave for cooking a large food mass is difficult d...

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IV. In the following text, six sentences or parts of sentences have been removed. Above
the extract you will find the six removed sentences PLUS one sentence which doesn't fit.
Choose from the sentences (A-G) the one which fits each gap (1-6). Remember, there is
one extra sentence you do not need to use. Write the correct letter in the box.
Choose from the following sentences to fill the spaces in the text. There is ONE extra.
A. Using a microwave for cooking a large food mass is difficult due to limited penetration of
microwaves.
B. This can be overcome by leaving the food to stand for a few minutes when cooking is
completed.

C. It is advised that the water should be poured slowly into another container that already
contains the powder.
D. In this way, buying a microwave oven with a turntable ensure the food is cooked
throughout.
E. Conversely the microwaves do not heat glass, ceramic and plastic containers.
F. If the microwaves are not absorbed inside the oven, the oven can be damaged by
electrical arcs and overheating of the microwave source.
G. When water in that state is disturbed, it can suddenly and unexpectedly boil violently.
MICROWAVING
Microwaving is a method of cooking where food is bombarded by microwaves, usually
within an appliance called a microwave oven which excite the water, fat and sugar
molecules, thereby heating (cooking) both the outside and center of the food at the same
time. (1)…………………
(A common myth is that a microwave oven cooks from the center of the food outward. This
appears to happen because heat generated at the surface escapes more readily from the
surface of the food into the surrounding air.) One advantage of microwaving is that small
amounts of food can be heated very quickly, making it useful for reheating leftovers.
The disadvantage is that food which is microwaved does not undergo some of the chemical
reactions, such as browning, which makes the food visually attractive. Primitive microwave
ovens often do not cook evenly, leading to a concern that bacteria easily killed by more
traditional cooking methods may survive the quick cooking time in "cold spots", though the
food item as a whole is cooked to a safe average temperature. (2) ……
Some high-end microwave ovens are combined with a convection oven which basically
cook the food using microwave and hot air simultaneously to achieve both the fast cooking
time and browning effect.
(3) …………………
However microwave ovens are used in some fast food chains and special microwave bags
are available for cooking fowl or large joints of meat.
Professional chefs generally recommend using microwaves for a limited set of tasks,
including: melting fats (such as butter) and chocolate, cooking grains like oatmeal and grits,
cooking rice, thawing frozen meats and vegetables before cooking by other methods and
quickly reheating already-cooked foods.
Using a microwave to boil water is potentially dangerous, due to superheating. In a
microwave, water can be raised quickly to a temperature above the boiling point before
major bubbles form, especially if it is purified and in a very clean glass vessel. (4)
…………………
This effect is rare, even for scientists who try to deliberately recreate it, and any seed
whatsoever for boiling is likely to prevent the problem. Boiling water with, for instance, a
teabag already in it will prevent any dangers by providing a seed, as will using a mug that is
not perfectly clean.

The risk greatly increases when water has already been boiled once in the same container.
This situation can occur if the user of the oven boiled the water once, forgot about it, then
came back later to boil it again. The first time the water boils, the seed bubbles
(microscopic bubbles of air around which larger steam bubbles grow) are used up and
largely eliminated from the water as it cools down. When the water is heated again, the lack
of seed bubbles causes superheating, and a risk of a steam explosion when the water's
surface is disturbed.
Placing something in the water before heating can mostly alleviate this risk. If you are
planning to mix something with the water, say tea or hot chocolate, adding it before heating
will insure that the water boils. Otherwise, placing a wood object, for instance a chopstick,
in the water before heating will also work.
Care should be taken when removing heated water from a microwave. Make sure that the
hands are protected from possible liquid boil-over, place the container on a level, heat-
proof surface and stir liquid with a warm spoon. Also, never add powdered substances
(such as instant coffee or cocoa mix) to the container taken from the microwave, due to the
addition of all those seed bubbles and the potential for violent, spontaneous boiling. (5)
…………………
Metal objects, such as metal utensils, in a microwave oven can lead to dangerous situations.
Metals do not absorb microwaves effectively. Instead, metals reflect microwaves, thereby
preventing the latter from reaching the food. (6) …………………
Thin metal layers, such as metal foil and mugs with metal trim can melt or burn due to the
strong electrical currents that are generated in metal objects. However, small solid metal
objects, such as spoons, in combination with a large amount of absorbing food or liquid,
normally do not lead to problems.
This article is licensed under the GNU Free Documentation License. It uses material from the
Original Wikipedia article.

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Lớp 8 Tiếng anh Luyện tập tổng hợp

ngô mai phương

21 tháng 2 2020 lúc 20:54

MICROWAVING Microwaving is a method of cooking where food is bombarded by microwaves, usually within an appliance called a microwave oven which excite the water, fat and sugar molecules, thereby heating (cooking) both the outside and center of the food at the same time. (1)………………… (A common myth is that a microwave oven cooks from the center of the food outward. This appears to happen because heat generated at the surface escapes more readily from the surface of the food into the surrounding air...

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MICROWAVING
Microwaving is a method of cooking where food is bombarded by microwaves, usually
within an appliance called a microwave oven which excite the water, fat and sugar
molecules, thereby heating (cooking) both the outside and center of the food at the same
time. (1)…………………
(A common myth is that a microwave oven cooks from the center of the food outward. This
appears to happen because heat generated at the surface escapes more readily from the
surface of the food into the surrounding air.) One advantage of microwaving is that small
amounts of food can be heated very quickly, making it useful for reheating leftovers.
The disadvantage is that food which is microwaved does not undergo some of the chemical
reactions, such as browning, which makes the food visually attractive. Primitive microwave
ovens often do not cook evenly, leading to a concern that bacteria easily killed by more
traditional cooking methods may survive the quick cooking time in "cold spots", though the
food item as a whole is cooked to a safe average temperature. (2) ……
Some high-end microwave ovens are combined with a convection oven which basically
cook the food using microwave and hot air simultaneously to achieve both the fast cooking
time and browning effect.
(3) …………………
However microwave ovens are used in some fast food chains and special microwave bags
are available for cooking fowl or large joints of meat.
Professional chefs generally recommend using microwaves for a limited set of tasks,
including: melting fats (such as butter) and chocolate, cooking grains like oatmeal and grits,
cooking rice, thawing frozen meats and vegetables before cooking by other methods and
quickly reheating already-cooked foods.
Using a microwave to boil water is potentially dangerous, due to superheating. In a
microwave, water can be raised quickly to a temperature above the boiling point before
major bubbles form, especially if it is purified and in a very clean glass vessel. (4)
…………………
This effect is rare, even for scientists who try to deliberately recreate it, and any seed
whatsoever for boiling is likely to prevent the problem. Boiling water with, for instance, a
teabag already in it will prevent any dangers by providing a seed, as will using a mug that is
not perfectly clean.

The risk greatly increases when water has already been boiled once in the same container.
This situation can occur if the user of the oven boiled the water once, forgot about it, then
came back later to boil it again. The first time the water boils, the seed bubbles
(microscopic bubbles of air around which larger steam bubbles grow) are used up and
largely eliminated from the water as it cools down. When the water is heated again, the lack
of seed bubbles causes superheating, and a risk of a steam explosion when the water's
surface is disturbed.
Placing something in the water before heating can mostly alleviate this risk. If you are
planning to mix something with the water, say tea or hot chocolate, adding it before heating
will insure that the water boils. Otherwise, placing a wood object, for instance a chopstick,
in the water before heating will also work.
Care should be taken when removing heated water from a microwave. Make sure that the
hands are protected from possible liquid boil-over, place the container on a level, heat-
proof surface and stir liquid with a warm spoon. Also, never add powdered substances
(such as instant coffee or cocoa mix) to the container taken from the microwave, due to the
addition of all those seed bubbles and the potential for violent, spontaneous boiling. (5)
…………………
Metal objects, such as metal utensils, in a microwave oven can lead to dangerous situations.
Metals do not absorb microwaves effectively. Instead, metals reflect microwaves, thereby
preventing the latter from reaching the food. (6) …………………
Thin metal layers, such as metal foil and mugs with metal trim can melt or burn due to the
strong electrical currents that are generated in metal objects. However, small solid metal
objects, such as spoons, in combination with a large amount of absorbing food or liquid,
normally do not lead to problems.
This article is licensed under the GNU Free Documentation License. It uses material from the
Original Wikipedia article.

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Lớp 8 Tiếng anh Luyện tập tổng hợp

Thanh Thanh

12 tháng 3 2020 lúc 15:03

Saving the Environment: One Home at a Time Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things. First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut dow...

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Saving the Environment: One Home at a Time

Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things.

First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to produce paper products. It takes very little effort. It is not hard to place plastic and glass bottles, aluminum cans and paper in a bin. Anyone can do it.

Second, we need to watch the amount of water used at home. It can be conserved by taking short showers instead of baths, repairing leaky faucets, using the dishwasher or washing machine only when fully loaded, or simply turning the faucet off while brushing your teeth.

Third, we need to reduce waste. We need to recycle whenever possible, but shouldalso try to use this waste effectively. For example, grass clippings and food scraps can be made into compost for plants. The average person produces 4.3 pounds of waste every day, but we can reduce that amount by recycling and reusing.

If we do our part in our own homes, we can help keep the planet from becoming more polluted.

1. Pollution is caused from the following sources except .

A. water in rivers B. water from households

C.wastes D. house chemicals

2. Recycling can help us .

A. never cut down trees B. produce more paper products

C.place garbage bins easily D. use products again and again

3. In order to save water, we can do all of the following things except .

A. fully use the washing machine

B.repair leaky faucets

C. take short showers instead of baths

D.turn the faucet off while brushing your teeth

4. Recycling helps to reduce waste because .

A. plants need to develop

B.waste can be recycled and reused

C.a person can do it in his home

D.an average man produces compost for plants

5. The word “It” in paragraph 2 refers to .

A. cutting down B. the number

C. recycling D. effort

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Lớp 8 Tiếng anh Luyện tập tổng hợp

ngô mai phương

21 tháng 2 2020 lúc 20:39

C. READING I. Fill ONE suitable word into each of numbered blaks in the passage. Australia is a big country, but nearly all Australians live near the sea. On hot summer days, you can see thousands of people at the beach. Many beaches have waves (1)______ are very high. These large waves are known as surf and the people who ride them are called surfers. Surfing is a skill, and it needs learning. Don’t (2)______ to be able to surf properly the (3)______ time you try. However, by practising a few...

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C. READING
I. Fill ONE suitable word into each of numbered blaks in the passage.
Australia is a big country, but nearly all Australians live near the sea. On hot summer days,
you can see thousands of people at the beach. Many beaches have waves (1)______ are very
high.

These large waves are known as surf and the people who ride them are called surfers.
Surfing is a skill, and it needs learning. Don’t (2)______ to be able to surf properly the
(3)______ time you try. However, by practising a few times you will learn (4)______ to do it.
Surfing is not a new sport. Perhaps its origins need explaining. It started hundreds (5)______
years ago in Hawaii. Men swam (6)______ to sea to catch fish and found they could come
back to land very quickly by riding the waves. These first surfers did not (7)______ a board.
They were “body surfers”. Many people (8)______ do this type of surfing today.
After a while people started to use boards and rode the waves by lying, kneeling or
standing (9)______ them. These first surfboards were made of wood and the water made
them rot after a while. Today, surfboards are made of plastic or fibreglass (10)______.

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Lớp 8 Tiếng anh Luyện tập tổng hợp

Nguyễn Ngọc Bảo Trâm

16 tháng 5 2020 lúc 17:36

III. You are going to read an article about a national vote for people’s favourite tree. Six sentences have been removed from the article. Choose from the sentences A-G the one which fits each gap (16). There is one extra sentence which you do not need to use. TREE OF THE YEAR The aim of the national Tree of the Year competition is to promote and celebrate the most interesting trees around the country. Images and descriptions of a shortlist of 28 trees are put online and the public are asked t...

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III. You are going to read an article about a national vote for people’s favourite tree. Six sentences have been removed from the article. Choose from the sentences A-G the one which fits each gap (16). There is one extra sentence which you do not need to use.

TREE OF THE YEAR

The aim of the national Tree of the Year competition is to promote and celebrate the most interesting trees around the country. Images and descriptions of a shortlist of 28 trees are put online and the public are asked to vote for their favourite.

The four trees that gain the most votes before 5 p.m. on 5th October will be given a grant of £1,000. In addition, all trees that receive 1,000 or more votes will get a grant of £500. The grants may be spent on a tree health check or advice from a tree expert, or an educational event, for example. (82) ………………. Among the 28 shortlisted trees there are a wide range of tree species, each with its own unique, fascinating story. For example, the ‘Ding Dong’ tree is a copper beech tree growing in a primary school playground. It was named the ‘Ding Dong’ tree because of a game pupils invented in which they race to touch its trunk, shouting ‘Ding Dong!’ The protective space underneath the 50-year-old tree is used as a magical outdoor classroom, while the indoor classroom displays pictures of the tree through each season of the year. (83) ……………….

Many of the other trees in the competition are remarkable for their age alone. The Craigends Yew, for example, is thought to be up to 700 years old, making it one of the oldest in Scotland. It is an amazing sight as many of its branches have layered. (84) ………………. As a result of these extra growths, the total size when measured around the tree’s crown (the main body of its leaves and branches) is a massive 100 metres.

Another very old tree, the Holm Oak in Kilbroney Park, Northern Ireland, is much loved by local people. It measures 3.6 metres around the trunk, and its beautiful bark looks like the skin of a snake. (85) ………………. The advantage of this lack of uprightness is that young children can climb safely and easily on it. Kilbroney Park is home to many remarkable trees, but this tree was chosen as the favourite by community members.

A 500-year-old veteran oak tree stands in the ancient woodland pasture at Carngafallt in Wales. One of the interesting things about this twisted, hollow tree is that it has several ‘air trees’ growing out of it. An ‘air tree’ is one growing without its roots touching the ground. (86) ………………. It extends its roots down inside the oak’s hollow trunk.

The original Bramley apple tree in Nottinghamshire is younger than many in this competition, but is the famous parent of all modern Bramley apple trees. (87) ………………. Many years later, Matthew Bramley, the new owner of the tree, was carrying some of his fruit when he met a gardener called Henry Merryweather. Henry asked if he could take some cuttings from Matthew's trees to grow his own trees. Mr Bramley agreed, provided they were named ‘Bramley's Seedling’.

A. This means that they are touching the ground and have taken root.

B. These roots have become enormous with age and have now emerged above the ground. Children love to jump over them like horses in a race.

C. But the most distinctive thing about this tree is that its main trunk is leaning towards the ground at an angle of 45 degrees. D. The best example of this on the big old tree is another species of tree called a rowan.

E. Alternatively, they could be used to hold a community event in honour of the tree. F. It was planted from a seed in 1809 by a woman called Ann Brailsford.

G. Children hang bird feeders from its branches and it is used as the focus of many of the educational activities going on around it.

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Lớp 8 Tiếng anh Luyện tập tổng hợp

Trần Bình Phương Trâm

13 tháng 1 2019 lúc 10:29

Thinking the Unthinkable Today ,it seems that no one is uninformed about the environment .Every day the media shows us more evidence of climate: (1)........ weather,melting icecaps and (2)............. seas.Most of us belive we can so somethings to(3)............ global disasters such as (4)............ or conserving energy. its strange to recall that before the 1960s few people knew of the damage we were going to the planet.however one scientist had already realized the dangers ahead.And tod...

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Thinking the Unthinkable

Today ,it seems that no one is uninformed about the environment .Every day the media shows us more evidence of climate: (1)........ weather,melting icecaps and (2)............. seas.Most of us belive we can so somethings to(3)............ global disasters such as (4)............ or conserving energy.

it's strange to recall that before the 1960s few people knew of the damage we were going to the planet.however one scientist had already realized the dangers ahead.And today,this same man believes it may be too late to (5)........... h world.

In the 1960s, professos James Lovelock came up (6)... one of the most famous theories on the environment the Daia hypothesis.According to this hypothesis,the earth's atmosphere,soil,and oceans work in concert to(7)........ an inhabitable environment for humans .if we dirupt these elements too severely the earth may one day become unhibitable.

Is Lovelock right this time too? Surely can we prevent this nightmare,(8)......... we all recycle,use renewable energy and travel less by plane and care? Lovelock disagrees.According to him it is now impossible to reveese global

Now over 90 years old Lovelock many not live to (10)........ if he is right or not

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Lớp 8 Tiếng anh Luyện tập tổng hợp

G.Dr

3 tháng 12 2018 lúc 23:15

Read the passage then choose the true (T) of false (F) statements. In the first year of lower secondary school, I had some difficulties in learning English. My English pronunciation was really bad and my English grammar was worse. I did not know about this. One afternoon after the lesson, my teacher of English told me to wait for for her outside the classroom. She took me to the school library and showed me cassettes of pronunciation drills Kelt in a glass bookcase. She also told me how to use...

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Read the passage then choose the true (T) of false (F) statements.

In the first year of lower secondary school, I had some difficulties in learning English. My English pronunciation was really bad and my English grammar was worse. I did not know about this. One afternoon after the lesson, my teacher of English told me to wait for for her outside the classroom. She took me to the school library and showed me cassettes of pronunciation drills Kelt in a glass bookcase. She also told me how to use an English-English dictionary to improve my English grammar. "Now I think you know what you should do", did she. I made much progress and only one year later, I won the first prize in the English speaking contest held for secondary school. Students in my home town.

1. What difficulties did Nam have in learning English in the first year?

A. The pronunciation C. Both pronunciation and grammar

B. The grammar D. The way of improving his pronunciation

2. How was his English pronunciation?

A. It was really bad C. It was wonderful

B. It was really good D. It was very interesting

3. Who wanted to meet him one afternoon after lesson?

A. His teacher B. One of his friends C. His father D. His mother

4. What did he win in the English speaking contest one year later?

A. The first prize B. the second prize C. the third prize D. fourth prize

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Lớp 8 Tiếng anh Luyện tập tổng hợp

Hanh Nguyen

17 tháng 3 2018 lúc 19:27

We are already familiar with computers-computers work for us at home,in offices,in industry.But it is also true that many children today are using computers at school before they can write.What does this mean for the future.Are these children today are computers at school before they can write.What does this mean for the future.Are these children lucky or not. Many people who do not know about computers think of them as machines that children play with.They worry that children do not learn from...

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We are already familiar with computers-computers work for us at home,in offices,in industry.But it is also true that many children today are using computers at school before they can write.What does this mean for the future.Are these children today are computers at school before they can write.What does this mean for the future.Are these children lucky or not.

Many people who do not know about computers think of them as machines that children play with.They worry that children do not learn from experience but just from pressing a button and that is not good for them .They think that children are growing up not nowing about the real world.

But people who understand more about computers see that they can be very good for children.A computer can help them learn about the real workd more quickly,to learn what they want,to learn and to think for themselves.And for the future,don't we need people who can think clearly,who know how to get information quickly and use it well.What do you think

Are we strange to computers

-

In which four places can you find computers

-

Does every think computers are good for children

-

What three things can computers help children to do.

-

Does the writer think this is a good thing

-

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Lớp 8 Tiếng anh Luyện tập tổng hợp

Luyện tập tổng hợp

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)

Luyện tập tổng hợp

Câu hỏi

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)