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

試題分析：考查時態(tài)，后面有引導詞when意思“當…時候”，當我在講話時你的心肯定一直在徘徊，must have been doing表示肯定一直在做某事，所以選C
點評：做時態(tài)題時，首先看時間狀語，由時間狀語確定句子的時態(tài)，如果沒有時間狀語，從句子暗含的意思，確定句子時態(tài)
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