问题补充:
—He was nearly killed by a car once.
—Oh, when was exactly?
—It was in he was riding a bike on the drive-way.
A. this; that
B. this; when
C. that; that
D. that; when
答案:
A. this; that
B. this; when
C. that; that
(答案→)D. that; when
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