do what they can__the old museum from__a to preserve ,being destroyd b prevent .being destroyed为什么不选b呢

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do what they can__the old museum from__a to preserve ,being destroyd b prevent .being destroyed为什么不选b呢
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do what they can__the old museum from__a to preserve ,being destroyd b prevent .being destroyed为什么不选b呢
do what they can__the old museum from__
a to preserve ,being destroyd b prevent .being destroyed为什么不选b呢

do what they can__the old museum from__a to preserve ,being destroyd b prevent .being destroyed为什么不选b呢
what they can是do的宾语,所以整句的谓语动词是do,后面的动词preserve只能以非谓语动词的形式出现了,所以用to preserve,而不能用动词原形.
希望能帮到你啊!

选A，此句选B的话这样一个句子里就出现两个动词，此句中do有具体意思，是“做”，所以应为do sth. to do，意“为了某事而做某事”。 这句话的意思是，他们要做力所能及的事使老博物馆免遭破坏。

就选B 吧

what do they do? what do they do they They shall do what they what do they What do they what do they What do they need? what animals do they they/have/what/do/(?) what do they what do they do?(工程师) what()they()they()there?what()they()they()there?[do] What do they doing?是What do they like doing？ What can't they do　还　 what they cant do? What ___ do they like? What are they( )(do)now what will they do firt What do they like doing?