單項(xiàng)選擇題If you () the equipment more carefully before sail, we () so much trouble now.

A.examined;are not having
B.had examined;would not have
C.had examined;would not have had
D.should examine;would not have


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1.單項(xiàng)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

2.單項(xiàng)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

4.單項(xiàng)選擇題After he () the test, the engineer put down the results.

A.has finished
B.finishes
C.had finished
D.would finish

5.單項(xiàng)選擇題Now that the valve is not worth (), I suggest it ().

A.to repair;to renew
B.repairing;be renewed
C.repairing;will be renewed
D.to repair;to be renewed

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