Messages ______ be changed from sound into electricity before they ______ be sent by radio.

试卷相关题目

• 1They got two free tickets to Canada, otherwise they______ able to afford to go.

  A.wouldn't have been

  B.mustn't have been

  C.wouldn't be

  D.hadn't been

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• 2The traffic light is red, so I＿＿＿＿＿＿stop my car.

  A.must

  B.have to

  C.can

  D.mustn't

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• 3—— Could I use your telephone? —— Yes, of course you ＿＿＿＿＿＿＿ .

  A.could

  B.will

  C.can

  D.might

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• 4Tom_____to several companies after he resigned his position as vice president, but he was rejected over and over again.

  A.applied

  B.stuck

  C.adjusted

  D.took

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• 5—— I didn't see her yesterday. —— Oh, but you ＿＿＿＿＿＿ .

  A.must have

  B.ought to

  C.should have

  D.cannot have

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• 6--Did Mary come to your birthday party? --No. I __________ her, but she was away on business.

  A.would like to invite

  B.would have liked to invite

  C.must have invited

  D.could invite

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• 7He _________ the job well, but he _________ so careless.

  A.had done; had been

  B.could do; was

  C.could have done; was

  D.hadn't done; had been

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• 8—What do you think of your nephew? —He__________ be very naughty but at the same time you poor.

  A.will ; will

  B.won't; can't

  C.may ; may

  D.can; can't

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• 9____ the expense, I ____ a round-the-world tour.

  A.Were it not … would take

  B.If it were not… take

  C.Weren't it for… will take

  D.If it hadn't been for… would have taken

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• 10On Sundays when I was a child, Father and I _______ get up early and go fishing.

  A.could

  B.would

  C.might

  D.should

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