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單項選擇題

We’ve tried many ways, but all in vainOnly in this way, （） the problem, I’m sure.

A.can we solve
B.we can solve
C.we will solve
D.can we solved

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單項選擇題

Let H （） the quantity of heat which has been converted into mechanical work.

A.represent
B.represents
C.representing
D.being represented

單項選擇題

The chief engineer suggests that the second engineer （） a dead line for handing in the work plan.

A.will set
B.shall set
C.set
D.sets

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