There are many kinds of synthetic materials, _____ plastics are the most common.

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• 1Every device _____ in the spacecraft must be designed and made with great care so as to be sure that nothing goes wrong in operation.

  A.to be fitted

  B.fitted

  C.fitting

  D.to have been fitted

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• 2It's true that the old road is less direct and a bit bumpy. We won't take the new one _____ because we feel as safe on it.

  A.however

  B.though

  C.nevertheless

  D.whatsoever

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• 3The meeting _____ in October, but the plan has been put off again and again.

  A.was to have been held

  B.ought to have held

  C.was to be held

  D.must have been held

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• 4The two astronauts _____ someday hope it is to fly the craft into earth orbit were fighttesting.

  A.that

  B.whom

  C.whose

  D.who

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• 5Mr.Jones, I am really pleased _____ you. And I hope we will be able to see each other in not long time.

  A.to meet

  B.to have met

  C.at meeting

  D.having met

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• 6I don't believe you are going to have the matter looked into today, _____、

  A.are you

  B.do you

  C.aren't you

  D.don't you

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• 7_____ that a society like the National Society for the Prevention of Cruelty to children is still needed in a civilized country.

  A.How does it come

  B.How it comes

  C.How did it come about

  D.How did it come

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• 8When we encounter more difficulties, we should be more spirited, and we should be more courageous _____.

  A.the more danger we are in

  B.the more in danger we are

  C.we are in more danger

  D.we are in danger more

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• 9While the total number of farmers engaged in the agriculture production is barely half _____ it used to be in 1959, the size of the average farm has tripled.

  A.that

  B.what

  C.which

  D.how

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• 10To acquire education is principal way of gaining status in a culture that generally stresses achievement, skillfulness, and upward _____.

  A.mobility

  B.motivation

  C.ambition

  D.promotion

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