(单选题)

Cigarettes can do harm to the lungs and greatly damage them if ______ in large quantities.

A.consuming

B.consumed

C.to consume

D.being consumed

参考答案：B

参考解析：

考查省略句。句意：如果大量吸烟，会对肺部造成极大损害。当状语从句的主语和主句的主语一致且从句谓语动词含有be动词时，可省略状语从句的主语和be动词，本题补充完整，即：Cigarettes can do harm to the lungs and greatly damage them if they are consumed in large quantities.故选B。

知识点：特殊句式英语专业基础知识英语语法教师招聘-小学英语

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