A telephone user may pay a fixed monthly charge and (allow) ______ to make an un

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问题 A telephone user may pay a fixed monthly charge and (allow) ______ to make an unlimited number of local calls in the month.

选项

答案 be allowed/is allowed

解析本题考查的是被动语态。allow为谓语，主语是a telephone user，为被动的关系，所以用be allowed或者是is allowed。

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