The old man walked slowly, stopping frequently__________.

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• 1 The __________ flowers were all that remained.

  A. two yellow little

  B. little two yellow

  C. yellow two little

  D. two little yellow

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• 2 Don' t risk __________ the job which so many people want.

  A. losing

  B. to lose

  C. lost

  D. your life to lose

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• 3 Don' t risk __________ the job which so many people want.

  A. losing

  B. to lose

  C. lost

  D. your life to lose

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• 4 __________ anything about the accident, he went to work as well.

  A. Not know

  B. Know not

  C. Knowing not

  D. Not knowing

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• 5We all know that it is possible for ordinary people to make their homes on the equator (赤道), altho

  A. feeling uncomfortably hot on the equator

  B. flying over the North Pole

  C. flying over the equator

  D.making homes on the equator

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• 6 The polar region is__________

  A. a good place to land at by aeroplane

  B. a good place to fly over

  C. a good place to fly past

  D. a good place to live in

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• 7 It is a delight to fly at the Pole because there__________

  A. planes fly higher than at the equator

  B. the eyes can reach about 4,000 meters

  C. planes are clear of bad weather

  D. planes fly more quickly than at the equator

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• 8 Aeroplanes can climb quickly__________

  A. in warm air

  B. in cold air

  C. when it reaches the polar region

  D. only when the clouds are down low

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• 9 Aeroplanes usually do not need to climb quickly or fly high in the polar region because__________

  A. they do not land there

  B. there are no clouds at all

  C. they can cross the ice with special equipment

  D. it is very cold

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• 10Trees are useful to man in three important ways: they provide him with wood and other prod-ucts; the

  A. They help him make money.

  B. They give him wood and other products.

  C. They help him prevent droughts and floods.

  D. They give him shade.

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