We --- the letter yesterday,but it didn't arrive A .ought to receive B .ought to have received C.must have received D.must receive
人气：248 ℃ 时间：2019-12-08 21:18:05
解答
B .ought to have received
我们本应该昨天就收到信的,(事实上没收到,所以是虚拟语气,后面也说了:) 但它(指信)没到.
所以,是B
A,不是虚拟不行.
C 一定收到,意思不对.
D 一定要收,不是虚拟也不行.
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