问题描述：
When the man --- the museun,his friends ---- him.
A.visited,saw
B.visited,seeing
C.was visiting,was seeing
D.was visiting,saw
The answer is D.
when不是只能跟一般过去吗?它能跟过去进行时吗?
A.visited,saw
B.visited,seeing
C.was visiting,was seeing
D.was visiting,saw
The answer is D.
when不是只能跟一般过去吗?它能跟过去进行时吗?
问题解答：
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