1) if people (travel)...........to work by bus, there (be)....................fewer car fumes A.to travel/be B.travel/are C. will travel/be D.travel/will be 2) if people didn't throw rubbish in the street, it (look)........attractive A. will look B.would look C. look D. to look 3) there are about 750 million English speakers in the world, and this number (increase)......fast A.is increasing B. to increase C.are increasing D.increase 4) in the future, natural disasters (predict).........accurately with the help of technology A. to predict B.predict C. will be predicted D.will predict 5) on my birthday, I was very pleased because I (receive)............a nice present A.receive B. had received C.without D.at

The world's population passed five-billion mark in 1987 and it is increasing (1)________ about 1.7% a year. At this rate of growth, the number of people in the world will (2)_________ every 41 years. This rapid increase has been called the (3)_________ explosion. No one knows how many people the Earth can (4)________ Many scientists belive that the world will soon become (5)_________, that is, it will have more people than it can support

1 A. of B. by C. to D.in

2 A. doubled B. to double C. doubling D. double

3 A. pollution B. polluted C. populated D. population

4 A. supports B. support C. supporting D. be suppported

5 A. overpopulated B. polluted C. populated D. overpopulation

Mong mấy bn giúp mk vs mk đang cần gấp mk sẽ tick cho ai tl cảm ơn các bn trước

1 I ...play with dolls when i was small

A Enjoyed B hate Cstarted D used to

2 it(take)him two hours to finish thr exercise

3 i had no difficulty (listen)to her english

4 we are....buying a new motorbike

A considering B deciding C expecting D thinking

5 if the earth stops(move)around the sun ,there will be no light on earth

6 if we don't do anything...the ice on the poles from melting,the earth will be flooded one day

A for stop B to stopping C to stop D stop

7 unless we ...throwing garbage into the river,it will be polluted

A stop B don't stop C will stop D won't stop

8 the pollution rate in this area seems (increase)slowly

9 your hair is too long now.it needs ...

A to cut B cutting C being cut D to be increase

10 your hair is too long now. It needs

A to cut B cutting C being cut D to be cutting

1. She told me not ....................... late .

a. be b. to be c. being d. to being

2. She went out without ..................... anything .

a. say b. to say c. saying d. to saying

3. They waied................. him in his living room .

a. see b. to see c. seeing d. to seeing

4. The dentist asked him not to forget .............. his teeth.

a. brush b. to brush c. brushing d. to brushing

5. She sings ............ .

a. beautiful b. nice c. beautifully d. lovely

6. Everybody wished .............. this activity.

a. keep b. to keep c. keeping d. to keeping

7. He volunteered ............ us all in his car .

a. take b. to take c. taking d. to taking

8. We can learn more about the undersea world ............. this invention .

a.because b. for c. thanks to d. thanks for

9. The number of participants .............. every week.

a. increase b. increases c. is increase d. are increase

III. Give the correct form of the words in brackets.
Traffic jam (1. to be)_______________ a common sight in big cities like Delhi, Mumbai, Calcutta etc. This is due to (2. increase) _______________ population of the metropolitan cities. People from far off places rush towards big cities to (3. earn) _______________as big cities (4. have)_______________many options and possibilities for them. Then there are permanent citizens also. So with the human traffic, vehicular traffic also increases. As the standard of living is (5. become)_____________
high everyone wants to (6.purchase)_______________his own car.

            At a time (1)___people___________ interest in astronomy is on the increase, amateur astronomers are finding (2)___it___________ increasingly difficult to observe the Milky Way from their back gardens. The (3)______________ for this is that the night sky is gradually being lost to light pollution, (4)______________ threatens to make astronomy a privilege that only scientists can enjoy.

            In (5)______________ to this growing threat, the International Dark Sky Association has set about awarding Dark Sky Reserve status to places that have so (6)______________ escaped the adverse effect of light pollution. When such a place is given this award, (7)______________ recognition of its exceptional night skies, it is protected by regulations to prevent light pollution. Up to (8)_____________, only a handful of places have been granted Dark Sky Reserve Status, but there are plans for (9)_____________ to be added so that amateur astronomers can continue to enjoy the night sky just as much as their (10)_____________ counterparts.

mng giúp mình với ạ

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the question.

Alaska is disappearing slowly, but surely. It is estimated that since the 19505, as much as fifteen percent of Alaska's land area has disappeared. How can a whole state be disappearing? The problem is that Alaska’s glaciers are melting. The state has more than 100,000 glaciers. These glaciers account for about 75,000 square kilometers, or five percent, of the state’s area. That is an area of land larger than Ireland!

According to a recent report by the US Geological Survey, ninety-nine percent of Alaska's glaciers are either retreating or diminishing. This diminishing seems mainly due to the increase in global temperatures. Since the 19605, the average year-round temperature has increased by almost 3°C. Additionally, the average winter temperature has increased by over 6°C. Presently, an estimated 100 cubic kilometers of ice is disappearing from Alaskan glaciers every year. It may be even more in the near future, as some scientists predict that the average world temperature could go up 4 to 7°C by the year 2100.

Another problem facing Alaska is its thawing permafrost. Much of the land in Alaska used to be permanently frozen or frozen for most of the year. Now, the thawing permafrost is causing a number of problems for people living in Alaska. Roads and utility poles are collapsing as the ground around and under them warms and soften. Also, the hard permafrost that originally prevented beaches from eroding during violent storms is now melting. People who live along Alaska's coasts are being forced to relocate. For villages on small low islands, one terrible storm could wipe out the entire community.

The melting permafrost and increasing temperatures are both affecting the forests of Alaska. As the permafrost under the forests melts, insects that normally do not turn up until the warmer seasons are appearing sooner. The spruce-bark beetle, for example, is increasing in numbers as a result of warmer winter temperatures. It usually takes about two years for these beetles to grow and reproduce in. very cold weather. However, due to the increase in temperatures, spruce-bark beetles are reproducing faster and damaging as many trees in one year as they previously damaged in two. If something cannot be done to

change things, Alaska's forests will not survive the turn of the century.

Some scientists believe that human activity is linked to a global increase in weather temperature. Whatever the cause of rising temperatures may be, the fact remains that temperatures are warming, affecting Alaska for the worse. Horribly, this could be a preview of what will happen to the rest of the world in the next century.

 What does the word “they” in paragraph 4 refer to?

A. trees

B. spruce-bark beetles 

C. temperatures 

D. insects