题目内容
20．---Do you know______？---Yes．She is doing her homework in her bedroom．（ ）
| A． | why your sister is doing homework | |
| B． | when your sister is doing homework | |
| C． | where your sister is doing homework | |
| D． | how your sister is doing |
分析 -你知道你的姐姐正在哪儿做作业吗？
-知道，她正在她的卧室里做作业．
解答 答案：C 根据选项内容和Do you know可知，考查宾语从句的引导词；又因为in her bedroom是表示地点的状语，所以宾语从句应该要用特殊疑问词where，故选C．
点评 本题考查宾语从句，做题时注意三要素时态、语序和引导词．本题先考虑语连接词，再根据句子的上下文的意思，做出选择．
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