cho n là số nguyên dương sao cho 2n +3 và 3n+4 là các số chính phương.CMR: 2021n-19 chia hết cho 40
Polar bears are in danger of dying out. (31)_____ some other endangered animals, it's not hunters that
are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has (32)_____ in size by about 30 per cent. The temperature in the Arctic has slowly been (33)_____ and this is causing the sea ice to melt, endangering the polar bears' home.
The polar bears' main (34)_____ of food are the different types of seal found in the Arctic. They catch
them by waiting next to the air holes the seals have (35)_____ in the ice. (36)_____ the bears are very
strong swimmers, they could never catch seals in the water. This means that the bears (37)_____ do rely
on the ice to hunt.
Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (38)_____ to swim up to 100km, but when there is less ice, they may
have to swim further and this can (39)_____ fatal to the bears. A number of bears have drowned in the
last few years and scientists believe that it is because they were not able to (40)_____ more sea ice before
they became too tired and couldn’t swim any further.
Question 31: A. Opposite
Question 32: A. cut
Question 33: A. lifting
Question 34: A. sources
Question 35: A. placed
Question 36: A. Even
Question 37: A. really
Question 38: A. learnt
Question 39: A. prove
Question 40: A. achieve
Often mistaken for common swallows, swifts are one of the most amazing species of birds in the sky. The resemblance between swifts and swallows is due to their similar lifestyles, which are both based on catching insects in flight. Concerning their appearance, there's not much to say about either species – they have long pointed wings, chunky bodies and are gray, brown or black in color. However, one feature which differentiates these wonderful birds is their tiny feet, which are so weak that they are hardly ever used. Their scientific name, Apodidae, originates from ancient Greek and means "without feet". In fact, a swift which lands on flat ground may not be able to get back into the air.
What makes swifts so incredible is their flying skill. Larger species of swifts are among the fastest fliers in the animal kingdom, reaching a speed of up to 160 km/h, and in a year, even the common swift can cover at least 200,000 km. What's more, they eat, drink and sleep on the wing, traveling across continents in search of warmer weather. A young swift may spend the first three years of its life in constant flight before it breeds.
Swifts' numbers are dwindling so they are fully protected by international law. As they always return to their nests, care must be taken not to destroy the wall or porch where nests may have been built. There is very good reason why these birds are so well loved. They do no harm and
make little or no mess,feeding on pesky insects such as mosquitoes and flies. But above all, they treat us to dramatic air shows through the spring and summer.
Question 11: What distinguishes swifts from swallows?
A. Swifts feed on insects. B. Swifts have very small feet.
C. Swifts sometimes land on the ground. D. Swifts catch their food while flying.
Question 12: What do we learn about swifts?
A. They prefer to live in warm climates.
B. There is no faster species than the swift.
C. They do not eat or drink while flying.
D. They can fly up to 200,000 km in their lifetime.
Question 13: In the first sentence of the third paragraph, what does dwindling mean?
A. spreading B. defending C. decreasing D. wasting
Question 14: What does the writer tell us about the birds’ nests?
A. They are often destroyed. B. They are used more than once.
C. They are protected by law. D. They are full of insects.
Question 15: Which of the following statements best expresses the main idea of the passage? A. Swifts and swallows have many similarities.
B. Swifts are becoming extinct all over the world.
C. Swifts are admirable and deserve protection.
D. Swifts are harmful but beautiful.
Question 16 refers to section A on page 3.
Question 16: What is the main purpose of section A?
A. to stress the importance of environmental awareness
B. to point out the benefits of recycling
C. to invite students and parents/guardians to a meeting
D. to announce a planned recycling scheme
Questions 17-18 refer to section B on page 3.
Question 17: What do we learn about the ballet?
A. It’s only performed during the Christmas holidays.
B. There will not be many performances.
C. It will be performed at Greenhill School.
D. It’s not suitable for older children.
Question 18: Why are people asked to fill out the tear-off portion at the end of the letter? A. in order to get better seats
B. so that the school secretary won’t be disappointed
C. to inform the school about which performance time they prefer D. so the school knows how many tickets to book
Questions 19-20 refer to section C on page 3.
Question 19: What type of person would a suitable candidate be?
A. cooperative B. introverted C. bossy D. competitive
Question 20: In the third sentence of the second paragraph, what does They refer to?
A. school trips B. staff members
C. extra-curricular projects D. applicants
Questions 21-23 refer to section D on page 3.
Question 21: Why does the center need volunteers now?
A. It is caring for more turtles than ever before.
B. Most of its turtles are sick or injured.
C. It is experiencing an increase in visitor numbers.
D. The existing volunteers are undergoing training.
Question 22: Why does the leaflet mention sponsorship?
A. to show that some school children have little free time
B. to highlight that the center is in need of money
C. to present an alternative form of participation
D. to encourage classmates to volunteer together
Question 23: What does the section tell us about the turtles the center has?
A. The vets check their progress once a week.
B. They are placed in the sea when they have recovered.
C. Caring for them is not at all cheap.
D. Their progress can be followed on the center’s website.
Questions 24-25 refer to sections A, B, C and D.
Question 24: Which sections mention activities that could form part of Greenhill School’s extra-curricular program?
A. sections A, B and C B. sections A, B and D C. sections B, C and D D. all sections
Question 25: What would a teacher at Greenhill school NOT be expected to do?
A. accompany children to theatrical performances
B. volunteer to help at the turtle center
C. attend activities and meetings after school hours
D. organize a tree-planting day in the school ground
Read the following sections and mark the letter A, B, C, or D on the answer sheet to indicate the correct answer to each of the questions from 16 to 25.
English Teacher Needed
We are looking for a well-qualified and experienced
Staff and Parents
English teacher to head our dynamic English Department. The
Reginald Bains, Principal
applicant must possess leadership qualities, but also the ability
to work alongside others, The newly appointed member of
In an effort to raise our students'
staff will be expected to head a group of teachers in a
environmental awareness, I have proposed
that we begin a recycling program at the
Our school program is varied and progressive. Applicants
school. A meeting has therefore been
must be willing to get involved in all school activities,
arranged for Friday, Nov 29 (7:00 pm) to
sometimes at weekends, and organize extra-curricular projects
discuss certain issues with staff and parents.
including volunteer programs and school trips. They should be
Points to be discussed are:
aware that Greenhill School expects all staff members to
• When the recycling program will begin
contribute new thoughts and ideas regarding the expansion of
• How it will be organized
our existing school program.
• What students and staff are expected to do
Over the years our school has made outstanding progress in
• How parents/guardians can contribute
this field and has also achieved an excellent academic
• A general discussion about the benefits of
reputation, so employing the right applicant is vital.
If you think you could do this position justice, please fax or
A full report of the meeting and an
email your CV to:
information leaflet will be sent to
parents/guardians at a later date with further
c/o Greenhill School,
details about the recycling program.
Potters Avenue, Framworth.
Fax: 44418 9721
A Winter Theater Evening
Experience the wonderful world of ballet
and the music of Tchaikovsky
On December 19 and 20, the weekend before Christmas, the Vonereva Ballet Company will be dancing The Nutcracker at the Central City Theater. With its spectacular Waltz of the Snowflakes scene, The Nutcracker is always a favorite during the Chrismas period. It is said to be one of the most enioyable ballet extravaganzas for all ages, and especially children, due to its Christmas story plot, dancing toys and fabulous costumes.
Performance times will be announced next week but, in the meantime, please fill out the tear- off portion at the bottom of this letter if you are interested. Children who want to attend, but whose parents/guardians aren't able to, will be accompanied by Mrs Carlson, head of the Science Department. Due to the limited number of performances, we must book soon so as to avoid disappointment. Tickets will not exceed $10, but the bigger the group, the cheaper the tickets.
Greenhill School's Winter Theater Evening The Nutcracker
Please complete ond return to the school secretary
Name of family ___________________________
We would like _____ tickets
Signature of parent/guardian ___________________
The Bayside Turtle Rehab Center
We are appealing for school children to work as volunteers at weekends. Presently, there are over 35 turtles in our care, a number which has broken all previous records, and the work involved and care they need is keeping the permanent members of staff at the center very busy.
Volunteers would be expected to do menial tasks such as cleaning, welcoming visitors, showing them round and generally
being on hand to help our trained vets when necessary. Most of our turtles are sick or have been injured, and therefore require a lot of tender loving care and attention from the vets,
If you have no time available but would like to help, you can sponsor a turtle for a small fee ($5 per month) and follow its rehabilitation and progress on a weekly basis, eventually taking part in its return to its natural environment. Perhaps you would like to do this together with a classmate.
So come along and visit us and our turtles. We'd all love to see you. We are located at Marina B2 and our phone number is 417 3831. You can also learn more about us online at baysideturtlecenter.com.
Mary Robinson – Director of Bayside Turtle Rehad Center
Proactive Job Hunting
Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1)_____, and nowadays many employees find it hard to
stay loyal to their companies for even a relatively short (2)_____ of time. According to a recent survey,
this is particularly true in London, where more than half of those asked said that they constantly (3)_____
one eye on other job opportunities, (4)_____ they are fairly happy in their existing jobs. A high number of
London workers say that they are always on the (5)_____, although they are content and motivated in
their current position.
Job seekers find that the internet (6)_____ them with a quick and easy way to find out what's available,
and 53 per cent said that they had applied for a job or registered with an employment agency in the past 12 months. This proactive (7)_____ means that people can look for a perfect job match with the (8)_____
of effort. But while this is good for job hunters, the growing lack of company loyalty could (9)_____ up
being a big problem for employers. Perhaps surprisingly, the (10)_____ factor attracting job seekers was
not more money, but challenging and interesting work.
Question 1: A. over
Question 2: A. period
Question 3: A. hold
Question 4: A. as well
B. just as
C. even if
D. so that
Question 5: A. search
Question 6: A. provides
Question 7: A. custom
Question 8: A. minimum
Question 9: A. run
Question 10: A. biggest