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

试卷相关题目

• 1Henry 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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• 2We saw many students playing on the playground, most of them _______ girls.

  A.are

  B.being

  C.were

  D.have been

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• 3Before 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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• 4_________, and we will do the work better.

  A.Given more time

  B.Give us more time

  C.Giving us more time

  D.Having given us more time

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• 5Did ______ on time make the teacher angry ?

  A.she not come

  B.she not to come

  C.not her coming

  D.her not coming

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

  A.Working

  B.Having worked

  C.To work

  D.Worked

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• 7_______ many times, he finally understood it.

  A.Told

  B.Telling

  C.Having told

  D.Having been told

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• 8The poor peasant seized him ______ the leg, _______.

  A.on; begged

  B.in; begging

  C.by; begging

  D.at; begged

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• 9Apart 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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• 10During 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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