题目列表(包括答案和解析)
20. ------The windows must have taken you quite a long time that day.
------ Right. They _____ for weeks.
A. haven’t been cleaned B. didn’t clean
C. hadn’t been cleaned D. haven’t cleaned
19. It’s important to weigh all ____ information to find out the truth of what is reported.
A. suitable B. relevant C. satisfactory D. proper
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