题目内容
12．They didn't know how to answer that question．（同义句转换）They didn't know howtheycould answer that question．
分析 --他们不知道如何回答那个问题．
--他们不知道他们如何回答这个问题．
解答 答案：they can．考查同义句．疑问词how+不定式to的简单句形式，可以用how引导的宾语从句代替，从句用陈述语序，主语是they他们，didn't是一般过去时，这里用情态动词could能．答案是they could．
点评 同义句转换最基本的是要保持原意不变，在理解语境的基础上，抓住关键单词或词组，运用相同词意的单词或词组完成试题．
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