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They _____ on the program for almost one week before i joine

时间:2022-01-20 22:47来源:未知 作者:admin 点击:
(单选题)20: They _____ on the program for almost one week before i joined them, and now we _____ on it as no good results have come out so far. A: had been working; are still working B: had worked; were still working C: have been workin
(单选题)20: They _____ on the program for almost one week before i joined them, and now we _____ on it as no good results have come out so far.
A: had been working; are still working
B: had worked; were still working
C: have been working; have worked
D: have worked; are still working
正确答案:♦A♦
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