Vitamin D helps our bodies make a special chemical, and this special chemical, _______, affects our brains, making us feel happy.

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• 1Not in the mood for talking, he kept his friends _______.

  A.in the distance

  B.far away

  C.at a distance

  D.a distance away

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• 2---Could I borrow your car for a while? --- _________. I won't use it today.

  A.By all means

  B.Never mind

  C.You are welcome

  D.Of course you could

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• 3  ________of both sides, the two companies decided to _______ to become more competitive in the global market.

  A.For the benefit; combine

  B.In the interest; be combined

  C.On the basis; combine

  D.With the help; be combined

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• 4A salty diet may increase the risk of stomach cancer ________ 10 percent, South Korean researchers found in a study of more than 2 million people.

  A.at

  B.to

  C.by

  D.For

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• 5The students scored 100 ______ in the intelligence test, while John got 160.

  A.on average

  B.in total

  C.in the middle

  D.on the whole

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• 6The US is ______ number 7, while the UK is _____ the 13th position.

  A.on; in

  B.in; at

  C.at; in

  D.of; on

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• 7Mike must be angry with me, for he walked________me without even saying hello.

  A.past

  B.on

  C.at

  D.Over

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• 8There are all sorts of ways that employees can be successful_________obtaining the better office environment.

  A.in

  B.On

  C.about

  D.For

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• 9Careful surveys have showed that audience _______ teachers and students are more likely to take seats _______ directed.

  A.1ike; that

  B.as; that

  C.1ike; as

  D.as; like

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• 10In common ______ other boys of his age, my young son is looking forward to _______ the permission to date.

  A.to; be given

  B.with; being given

  C.like; being given

  D.as; be given

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