问题
选择题
We ______ here at lunch time; we were delayed at the airport, though. [ ]
A. could be
B. would stay
C. must have been
D. would have been
答案
答案：D
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We ______ here at lunch time; we were delayed at the airport, though. [ ]
A. could be
B. would stay
C. must have been
D. would have been
答案：D