问题描述：
用动词的真确时态填空
S:It's all arranged.Dr.Robert_____(travel) down tomorrow night.I____(meet) him at the station and we ____(drive) straight to the lecture hall.
D:What ____(talk) about?We ____(have) an informal discussion afterwards.
S:Just a minute!One question at a time!He thinks his subject ___(be)Recent Developments in Open Heart Surgery;the lecture probably____(last) about two hours;we____(invite) all the stndents but we____(not allow) members of the public to attend.Er,what was the last question?
D:He____(stay)for a discussion after the lecture?
S:Oh,no.He_____(return) to London immediately because he____(perfrom) an operation the next day.I___(take) him back to the station at 9:30.
S:It's all arranged.Dr.Robert_____(travel) down tomorrow night.I____(meet) him at the station and we ____(drive) straight to the lecture hall.
D:What ____(talk) about?We ____(have) an informal discussion afterwards.
S:Just a minute!One question at a time!He thinks his subject ___(be)Recent Developments in Open Heart Surgery;the lecture probably____(last) about two hours;we____(invite) all the stndents but we____(not allow) members of the public to attend.Er,what was the last question?
D:He____(stay)for a discussion after the lecture?
S:Oh,no.He_____(return) to London immediately because he____(perfrom) an operation the next day.I___(take) him back to the station at 9:30.
问题解答：
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