题目内容

- I beg your pardon?
- Your mind must have been __________ when I was speaking, wasn’t it?
A．wonderingB．wanderingC．walkingD．speaking
B

试题分析：考查时态，后面有引导词when意思“当…时候”，当我在讲话时你的心肯定一直在徘徊，must have been doing表示肯定一直在做某事，所以选C
点评：做时态题时，首先看时间状语，由时间状语确定句子的时态，如果没有时间状语，从句子暗含的意思，确定句子时态
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