新prep1-239

239 Were it not for the fusion-powered heat and radiation that rush from its core, instead its own weight would cause a star to collapse

A. instead its own weight would cause a star to collapse

B. instead a star would have collapsed under its own weight

C. a star would have to be collapsing under its own weight

D. a star would collapse under its own weight

E. its own weight would have caused a star’s collapse

请问选哪个？为什么，谢谢。

选D

句子意思是：如果不是有fusion-powered heat和radiation的话，“星星”就会因自身重力而塌陷。

1、主句前出现代词“rush from its core”，it指代star，那主句主语就是star，排除ABE

2、由于if it were not for....的句型（如果不是因为XX的话），instead出现不和逻辑，再次排除AB

3、CD比较，C太啰嗦，D言简意赅