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() 10. — Could you join us this afternoon?

—Sorry,I . I take care of my little sister because my mother is out.

   A. can't; may   B. mustn't; have to   C. can't; have to   D. mustn't; may

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(D) How would you use a radio or a telephone if you had no electricity or batteries? These 1 bothered (使煩惱) British inventor Trevor Baylis. So in 1996 he 2 a wind-up (裝有發(fā)條 的) radio. It doesn’t need electricity or batteries. You wind it up 3 hand. It plays for about an hour. Then,you wind it up 4 . Today it's made in South Africa.

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Dear Principal,

I'd like to recommend Susan for this year's Youth Award.    

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