After they had walked a day in the desert,they ___ all tired out.

After they had walked a day in the desert,they ___ all tired out.
A.had been
B.were
C.have been
D.are
选B,请帮我分析一下,谢谢!
其他人气:383 ℃时间:2019-09-29 06:07:30
优质解答
这句话是说他们在沙漠里走了一天之后,他们都累垮了.前半句中had walked是过去完成时,后面要接一般过去时的
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