题目内容
9．Mr．Li_____us a report on our environment when the earthquake happened in Japan．（ ）| A． | gave | B． | is giving | C． | was giving |
分析 当在日本发生地震时李先生正在做关于我们环境的报告．
解答 答案：C
根据时间状语从句when the earthquake happened in Japan可知这是过去发生的事情，结合语境和选项，当发生地震时，另一件事情也就是做报告正在同时进行，表示在过去某个时间点正在发生的事情或进行的动作要用过去进行时，其结构为was/were+现在分词．由于主语Mr．Li为第三人称单数，所以应用was．综合以上分析，故选C．
点评 此题考查过去进行时态的用法．做此类题抓住表示时间的状语是判断出时态的关键，理解好句意，在此基础上运用时态的构成就能选出正确答案．要注意主谓一致的问题．
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