题目内容
I the answer to her possible, but I was fully occupied then.
A. could explain; if it had been B. must have explained; were it
C. should have explained; had it been D. should have explained; should it be
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题目内容
I the answer to her possible, but I was fully occupied then.
A. could explain; if it had been B. must have explained; were it
C. should have explained; had it been D. should have explained; should it be