Will you please lend me the manual when you ___________?
A. have finished
B. will finish
C. will have finish
D. finishing
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Eighty percent of the students _________ from Japan.
A. comes
B. come
C. are coming
D. is coming
We _________ for an hour when the bus finally came.
A. waited
B. have waiting
C. have been waiting
D. had been waiting
主视图和俯视图的投影规律是（ ）主视图和左视图的投影规律是（ ）左视图和俯视图的投影规律是（ ）
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