In the past few years, research has suggested that Vitamin D may increase the level of serotonin（血清素）, one of the key nurotransmitters influencing our mood, and ________it helps to relieve mood disorders.  

试卷相关题目

• 1 Only when the war was over _______ return to his hometowns.

  A.have the soldiers

  B.the soldiers

  C.the soldiers did

  D.did the soldiers

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• 2Peter was so angry at all ____ Mary was doing ______ he walked out.

  A.what; as

  B.what; that

  C.that; which

  D.that; that

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• 3Finally, the thief handed everything _______ he had stolen to the police.

  A.which

  B.what

  C.whatever

  D.that

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• 4It never occurred to humans until the mid-l990s ______ some animals can be cloned.

  A.where

  B.that

  C.when

  D.what

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• 5So well ______ in 2009 that the world has agreed that it was the year of Chin

  A.A.did China perform

  B.China has performed

  C.was China performed

  D.China is performing

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• 6“I'm certainly more and more to the conclusion that Iraq has, ______ they maintained（断言）, destroyed almost all of _____ they had in the summer of 1991.” Blix said.

  A.which, what

  B.as, which

  C.as, that

  D.as, what

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• 7After graduation I'd like to find a job ______ I can use what I have learnt at school.

  A.whose

  B.which

  C.where

  D.that

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• 8She is such an outstanding leader _______ she is loved by the people throughout Chin

  A.A.whom

  B.who

  C.which

  D.that

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• 9Jack is pleased with ____ you have given him and all ____ you have told him.

  A.that, what

  B.what, that

  C.which, what

  D.that, which

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• 10____ difficult the task may be, we will try our best to complete it in time.

  A.No matter

  B.No wonder

  C.Though

  D.However

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