The stones they carried were used houses and bridges. A.to build B.for building C.to be buildD.AandB在used后面选择

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The stones they carried were used houses and bridges. A.to build B.for building C.to be buildD.AandB在used后面选择
The stones they carried were used houses and bridges. A.to build B.for building C.to be build
D.AandB
在used后面选择

The stones they carried were used houses and bridges. A.to build B.for building C.to be buildD.AandB在used后面选择
选D
be uesd to do被用于做某事
be used for doing sth 被用于做某事
两者相同 常可互换
另外注意
习惯于做某事be used to doing,
过去常常做某事used to do

used to+ 过去常常(做某事),used for 用于做……,故答案选B

A. to build

A