They on the program for almost one week before I joined them, but still no good results so far.
A. had worked ; e out
B. have worked ; came out
C. had been working ; have e out
D. have been working ; have e out
网友回答
A. had worked ; e out
B. have worked ; came out
(答案→)C. had been working ; have e out
D. have been working ; have e out
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