题目内容

18．-We must keep our classroom        every day．
-Yes，Miss Gao．（　　）
A．cleanB．cleanedC．to cleanD．cleaning

分析 --我们必须每天保持教室清洁．
--是的，高老师．

解答 答案：A．
本题考查非谓语动词的用法．根据语境推测句意是"我们必须每天保持教室清洁．"，结合设空处前面的 keep判断此题考查句式"keep+宾语+形容词（宾语补足语）"； 所以选A．

点评 本题考查非谓语动词的用法，抓住句中的关键词并联系相关的语法知识可得出正确的答案．平时注意对此类短语或句式用法的总结与归纳．

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