题目内容
16．---What did they do last night？---__________．（ ）
| A． | They stay at home | B． | They were fine | ||
| C． | They did their homework | D． | They are studying for the test |
分析 --昨天晚上他们做了什么？
--他们做了他们的作业．
解答 答案：C．考查交际用语．句意"--昨天晚上他们做了什么？--他们做了他们的作业．"．A他们呆在家里，一般现在时态．B他们很好，一般过去时态．C他们做了他们的作业，一般过去时态．D他们正在为考试学习，现在进行时态．根据last night昨天晚上，可知应该是一般过去时态，因此A，D不正确，问做什么，B不正确．答案是C．
点评 考查交际用语，在日常学习中要从实际情景交际中多练习，掌握一些习惯用语．结合语境，分析选项，选择正确的回答，完成练习．
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