We must keep our classroom______.

A. cleaning         B. clean            C. to clean

 

【答案】

B

【解析】試題分析：本句中keep是系動詞，后面接形容詞作表語，故選B，干凈的。

考點：keep用法

點評：keep sth adj保持某物怎么樣，固定短語的考查也是英語考查的一個重點，熟記這些短語結(jié)構(gòu)可以減少答題中的分析判斷時間，所以平時加強短語記憶也是學(xué)好英語的關(guān)鍵環(huán)節(jié)。

 

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