—What did she say just now?
—Sorry, I don’t know. I ________ an email at that time.
A. write B. will write C. wrote D. was writing
【答案】D
【解析】句意：——刚才她说什么？——对不起，我不知道，在那时我在写电子邮件。A. write一般现在时态的结构；B. will write一般将来时态的结构；C. wrote一般过去时态的结构；D. was writing过去进行时态的结构；根据at that time.可知用过去进行时态；故选D
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