_______ many times, he finally understood it.

试卷相关题目

• 1—— _________ abroad for 10 years, he went back home.

  A.Working

  B.Having worked

  C.To work

  D.Worked

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• 2 ______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes.

  A.Being invented

  B.Inventing

  C.Invented

  D.Having invented

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• 3Henry always forgets things he has done. Yesterday he forgot__________ and looked for it everywhere.

  A.to post the letter

  B.to have the letter posted

  C.to have posted the letter

  D.having posted the letter

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• 4We saw many students playing on the playground, most of them _______ girls.

  A.are

  B.being

  C.were

  D.have been

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• 5Before becoming a pilot, he spent quite a long time ________.

  A.to be trained

  B.being trained

  C.training

  D.to train

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• 6The poor peasant seized him ______ the leg, _______.

  A.on; begged

  B.in; begging

  C.by; begging

  D.at; begged

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• 7Apart from the urgent problems _____________by wars and conflicts, the UN helps countries with other problems such as lack of education ,lack of food , poverty ,disasters and disease.

  A.to cause

  B.having been caused

  C.caused

  D.having caused

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• 8During the day, we'll walk across the land, ________ the footprints of big animals.

  A.will follow

  B.follow

  C.following

  D.to follow

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• 9It was ________ the quality of life in the future ________ I took this training course，not just to make more money.

  A.to improve; that

  B.improving; when

  C.to improve; when

  D.improving; that

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• 10The old scientist has been invited to a party ________ next Monday evening.

  A.holding

  B.hold

  C.being held

  D.to be held

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