Paul doesn’t have to be made ______. He always works hard.

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问题 Paul doesn’t have to be made ______. He always works hard.

选项 A、learn
B、to learn
C、learned
D、learning

答案B

解析 英语中有几个使役动词和感官动词(如 make,have,let,see,hear,notice,find等)后接动词不定式做宾补时,要省略不定式符号to;但当它们用于被动结构时,被省略的不定式符号to一定要带上。故[B]项正确。
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