they do what they can__the old museum from__A.to preserve;being destroyedB.protect;destroyingC.prevent;being destroyedD.keep;being destroyed

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theydowhattheycan__theoldmuseumfrom__A.topreserve;beingdestroyedB.protect;destroyingC.prevent;beingd

they do what they can__the old museum from__A.to preserve;being destroyedB.protect;destroyingC.prevent;being destroyedD.keep;being destroyed
they do what they can__the old museum from__
A.to preserve;being destroyed
B.protect;destroying
C.prevent;being destroyed
D.keep;being destroyed

they do what they can__the old museum from__A.to preserve;being destroyedB.protect;destroyingC.prevent;being destroyedD.keep;being destroyed
A
第一处what they can是插入语,可以不去管它,也就是they do something 后面是表目的,用to do,即.to preserve,后面是防止旧的博物馆被破坏,所以,用被动,即being destroyed
不明白欢迎来追问.
多谢了!

D

A

a to表示目的，为了。what they can 是do 的内容，所以can后面不用动词原形。后一个空选被动，因为是人去破坏。

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