The teacher ________ oxygen ________ a gas.

试卷相关题目

• 1I found the door ________ when I got home.

  A.opened

  B.closed

  C.to open

  D.to close

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• 2What could you do to ________ the difficulties?

  A.get

  B.hold

  C.overcome

  D.take

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• 3Dress warmly, ______you will catch cold.

  A.and

  B.but

  C.because

  D.or else

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• 4Mr. Black walked into the bedroom ________ tiptoe, ________ of waking up his wife.

  A.with; was afraid

  B.in; afraid

  C.at; was afraid

  D.on; afraid

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• 5Painting in oil is harder than______.

  A.water colours

  B.in water colours

  C.paint in water colours

  D.painting in water colours

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• 6Gold is _____most valuable of all metals.

  A.the much

  B.very

  C.the far

  D.far the

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• 7Be careful when ________ the road.

  A.cross

  B.crossed

  C.crossing

  D.across

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• 8My English is poor．Can you give me some ________to improve it？

  A.advise

  B.advice

  C.advises

  D.advices

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• 9Charlie ________ four dollars on the dictionary.

  A.paid

  B.took

  C.cost

  D.spent

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• 10The diamond is ________.

  A.great valuable

  B.of great value

  C.of very value

  D.great value

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