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單項選擇題

It is no （） arguing about this problem, because our agent will never change his mind.

A.help
B.good
C.use
D.worth

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單項選擇題

I am sorry （） waiting for a long time.

A.to keeping you
B.to kept you
C.to have kept you
D.kept you

單項選擇題

By this time tomorrow, the ship （）its repair work in the engine room.

A.will do
B.has done
C.had done
D.will have done

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