They didn't know ( ) with the machine.A what is the matter.B what the matter is

They didn't know ( ) with the machine.A what is the matter.B what the matter is
C what was the matter.D what the matter was
英语人气:979 ℃时间:2019-09-03 00:08:20
优质解答
D 宾语从句仍用一般句式,不要倒装
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