Mary ___on her new priject late last night ,so she felt sleeply in the office this morning
Mary ___on her new priject late last night ,so she felt sleeply in the office this morning
a.must work b.must have been working c.must be working d.must have been worked
選什么.
a.must work b.must have been working c.must be working d.must have been worked
選什么.
英語人氣：759 ℃時(shí)間：2020-05-07 16:02:45
優(yōu)質(zhì)解答
嗯,是選B,因?yàn)樽蛲淼氖聝?屬于過去式,這句話意思是,他一定做完工作的很晚,所以今天早上困.也就是說對過去進(jìn)行推測,而對過去的推測固定用法就是,must have done,所以不是B,就是D,但是D表示被動(dòng),不能翻譯成被工作,明白了么.
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