The research scientists often meet with problems________new types of instruments for solutions.

试卷相关题目

• 1When they entered the room, they found the windows open and something________.

  A.stolen

  B.to be stolen

  C.to steal

  D.stealing

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• 2China has introduced a national two-child policy________ the challenge of aging population.

  A.to meet

  B.meet

  C.met

  D.meets

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• 3At the crossing there is an arrow________ the direction to the farm.

  A.indicating

  B.to indicate

  C.indicated

  D.indicates

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• 4The headmaster,________early retirement last year because of his bad health, was invited to the opening ceremony of the art festival.

  A.was forced into

  B.having forced to

  C.forced into

  D.who was forced to

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• 5________ over a week ago, the goods haven’t arrived so far.

  A.Ordering

  B.To order

  C.Having ordered

  D.Ordered

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• 6What’s done is done.It’s no use ________ anyone for it.

  A.blaming

  B.blame

  C.to blame

  D.to be blaming

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• 7He stopped________ last week and feels much better now.

  A.smoking

  B.smoked

  C.smokes

  D.to smoke

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• 8There is no point________to remember all those names and addresses.The most important thing is to understand the events associated with them.

  A.to try

  B.to be trying

  C.trying

  D.be trying

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• 9I’m going to get my letters ________up tomorrow afternoon if I can finish writing them today.

  A.type

  B.to type

  C.typed

  D.typing

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• 10John suggested________anything about it until they found out more facts.

  A.not tosay

  B.not say

  C.to say not

  D.not saying

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