_____ these experiments were successfully completed would we think of going into humans.

试卷相关题目

• 1_____ I do feel pity, I can't really do very much to help them out of the difficulty.

  A.As long as

  B.As

  C.while

  D.Even

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• 2Believe it or not, that is _____ people call the sixth sense.

  A.when

  B.what

  C.why

  D.which

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• 3Mrs Chen is very strict — we don't dare to say a word _____ she asks us to.

  A.until

  B.before

  C.when

  D.unless

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• 4_____ he thought he was helping us with the work, he was actually in the way．

  A.Since

  B.When

  C.Because

  D.If

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• 5Growing up ______ Micheal Jordan was in his prime, Beijing native Wu You knew what he wanted to do

  A.since

  B.when

  C.until

  D.before

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• 6 _____ you are so eager to join the school basketball team, why not try out for it?

  A.While

  B.Now that

  C.Though

  D.Unless

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• 7We need some more facts and figures __________ we take the final decision.

  A.since

  B.before

  C.after

  D.until

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• 8Mary and I have been close friends ______ we met each other 10 years ago.

  A.when

  B.since

  C.until

  D.as

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• 9I was surprised by what she said, _________made me recognize what silly mistakes I had made.

  A.what

  B.that

  C.which

  D.Who

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• 10She always buys me a nice present _________ she comes to see me .

  A.the first time

  B.every time

  C.the moment

  D.immediately

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