【单选题】The mother didn’’t know_________ to blame for the broken glass as it happened while she was out.
A、who
B.when
C.how
D.what
网考网参考答案:A
网考网解析:
本题考查动词不定式疑问式的用法。连接代词或副词+不定式构成了不定式的疑问式,在句子中可以做主语、宾语、表语和状语。如:Mr.Li taught us how to work out the difficult problem.李先生教我们如何解难题。本句的意思是:“杯子摔碎了,妈妈不知道该责备谁,因为当时她出去了。”
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