“What’s going on there?” “Sorry, I don’t know what ”A. is the matterB. is matterC. a matt

发布时间：2020-08-16 07:27:45

“What’s going on there?” “Sorry, I don’t know what     ”
A. is the matter
B. is matter
C. a matter is
D. matter is

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(答案→)A. is the matter
B. is matter
C. a matter is
D. matter is
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