补全对话
A:Can you help me to carry the computer?
B: .
A:Do you know it is made?
B: . It in Shanghai.
A:When did you buy it?
B:I it last year.
A:So you it a year.
B:Yes,and it can most of the work that we can do.
Certainly(sure), where, Yes, is, made, bought, have, had, for, do.