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The woman in the office __________ not to have made too much noise. A.ought B. need C.

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The noise was caused by a dog __________ a mouse through the back door. A. catching B. fighting C. following D. chasing

She lost her __________when the policeman stopped her to check whether her passport was

Radio is one of __________ means of sending news and information. A.the most common B. the commonest C. more common D. common

In recent years special attention has been paid __________ developing the students' productive skills. A.over B. to C. on D. in

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