Some green beans, long enough, can be poisonous .A．if not be cookedB．if not cookedC．if not cookingD．if not being cooked 题目和参考答案——青夏教育精英家教网—

Some green beans, ______ long enough, can be poisonous (有毒的).

A．if not be cooked

B．if not cooked

C．if not cooking

D．if not being cooked

试题分析：句意：一些绿豆如果煮的时间不够久.可能会有毒。这里是表条件,而且是被动语态,相当于：Some green beans,if they are not cooked long enough, can be poisonous (有毒的). 当主从句的主语一致的时候，可以省略从句的主语和be动词，所以是B。

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