题目内容
The scientist _____ Canada and he will give us a talk when he _____ back.
A. has gone to/comes B. has been to/will come
C. has gone to/will come D. has been to/comes
A
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题目内容
The scientist _____ Canada and he will give us a talk when he _____ back.
A. has gone to/comes B. has been to/will come
C. has gone to/will come D. has been to/comes
A