单选题
On his way
to school yesterday morning, Prof. Wang
came across
an old friend and
stopped talking
with him for
quite a while
.
A. On his way
B. came across
C. stopped talking
D. quite a while
A
B
C
D
【正确答案】
C
【答案解析】
stop doing停止做;stop to do停下来去做。
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