It was in 1969 ___ the American astronauts first succeeded in landing on the moon

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• 1It is many years ______ we enjoyed ourselves on the great occasion.

  A.since

  B.that

  C.before

  D.when

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• 2He has been talented at designing and creating things ________ he was young

  A.when

  B.before

  C.since

  D.while

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• 3---We've seen many more days of blue skies recently. ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky”program, the city only ________ about 100 days a year.　　

  A.which ,sees

  B.that ,saw

  C.when ,saw

  D.and ,seeing

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• 4___________ she will go or not doesn't matter much

  A.When

  B.That

  C.If

  D.Whether

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• 5I cannot hear the professor clearly as there is too much noise ________ I am sitting

  A.before

  B.until

  C.unless

  D.where

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• 6---Did you wait for him long? ---No, I hadn't waited long ______ he appeared.

  A.unless

  B.until

  C.before

  D.since

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• 7Will you pass me the dictionary _____ the cover is dark blue?

  A.its

  B.which

  C.whose

  D.of which

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• 8One of the men present held the opinion ______ the book said was wrong.

  A.what that

  B.what

  C.that

  D.that what

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• 9Frank lives a simple life ________ he has lots of money

  A.although

  B.because

  C.so

  D.if

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• 10---Have you got the result? ---No, It will be some time ______we know the result.

  A.when

  B.since

  C.if

  D.before

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