问题

The old professor told us that every part of the materials should be made use of _____ the station.[ ]

A: building
B: to build
C: build
D: being built

正确答案是：

同类题型

The plane wasto arrive 9:30, but was an hour late.

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What’s that terrible noise?—The neighbors ______ for a party

I ____ have been there, but I ____ not find the time.

was about to walk over to Tom’s seat when he ____ and left.