They must have finished the work by the end of last month,______?_英语解答

They must have finished the work by the end of last month,______?
A.mustn't they B.haven't they C.hadn't they D.didn't they

人气：321 ℃　时间：2019-08-19 17:10:05

解答

B 在表示猜测的反义疑问句提问中,如果出现明显的时间表示,那么反义疑问句,
就根据这个时间状语来写,因为是by last month,所以用过去完成时