This substance ________ a gas when heated .

试卷相关题目

• 1In order to be in good health ,we should eat ________ food .

  A.healthful

  B.fresh

  C.well-cooked

  D.delicious

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• 2The day she got married is a day she’ll always _______.

  A.look up to

  B.look forward to

  C.look up

  D.look down on

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• 3The power of ______ is very great.

  A.press

  B.pressure

  C.the press

  D.pressing

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• 4Whenever he makes a promise, he will ________ it.

  A.keep out

  B.insist on

  C.stick to

  D.stick at

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• 5My father ________ me to buy a bike for me.

  A.allowed

  B.permit

  C.agree

  D.promised

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• 6A doctor was called in to ________ the sick woman.

  A.hear

  B.feel

  C.see

  D.look at

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• 7She ________ how they could make a living in such a wild place.

  A.wondered

  B.surprised

  C.supposed

  D.wished

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• 8Since his house was not big enough, he had to ________ his study the lab for his experiments.

  A.take

  B.find

  C.turn

  D.make

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• 9It is the ________ for men to wear skirts in Scotland.

  A.habit

  B.pleasure

  C.custom

  D.method

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• 10His English was too limited. ________, he didn’t lost heart and decided to do his best to improve it.

  A.so

  B.and

  C.however

  D.or

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