A good rest between classes ________ recover brain power to its best and make us perform better in class later.

A．mustB．canC．needD．shall

B

解析試題分析：考察情態(tài)動(dòng)詞用法。A必須，一定；B能夠，可能；C需要；D將要；句義：課間良好的休息能夠讓大腦得到恢復(fù)到最好狀態(tài)，讓我們?cè)俳酉聛?lái)的課上表現(xiàn)更好。根據(jù)句義說(shuō)明使用can，表示能夠。故B正確。
考點(diǎn)：考察情態(tài)動(dòng)詞用法

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