A recent survey of the opinions of experts _____ that three hours of outdoor exercise a week _____good for one's health.

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• 1-The two astronauts had been trained for long before theyflew to space.    -Oh, they____quite a lot of difficulties.   

  A.might go through

  B.may go through

  C.should have gone through

  D.must have gone through

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• 2 — How are you today?   — Oh, I ____ as ill as I do now for a long time.    

  A.isn't feeling

  B.wasn't feeling

  C.don't feel

  D.haven't felt

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• 3—Will you lend me some paper?—Sorry, mine ______.

  A.is running out of

  B.has been run out

  C.has run out

  D.has run out of

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• 4He _______ any money in the lottery yet, but he expects to.

  A.didn't win

  B.hadn't won

  C.hasn't won

  D.isn't winning

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• 5By the time he realizes he________into a trap, it'll be too late for him to do anything about it.

  A.walks

  B.walked

  C.has walked

  D.had walked

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• 6Jane got sick last January and ____ in bed ever since.

  A.was

  B.had been

  C.has been

  D.would be

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• 7The exercises are extremely difficult, but half of the class_____ them ahead of time.   

  A.has already finished

  B.will finish

  C.have already finished

  D.finishes

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• 8It ________ quite correct that happiness comes from thinking about things in a positive way.

  A.has turned out

  B.has been turned out

  C.is turning out

  D.is turned out

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• 9My father and my mother have been married for 30 years, and never once ____ with each other.

  A.have they quarreled

  B.they have quarreled

  C.did they quarrel

  D.had they quarreled

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• 10— How firm she is!— That's the point! Her spirits __________ very well despite all her bad luck.

  A.keep up with

  B.have kept on

  C.have kept up

  D.were kept up

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