PREP1-239 GWD-12-Q3 一个没有怎么讨论过的题目，大家一起来看看吧

PREP1-239.      (28502-!-item-!-188;#058&003082)         (GWD-12-Q3)

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

答案：D

1.怎么能拍出选项AB？instead不能这么用吗？

2.前面就算是倒装也是个句子，后面又是一个完整的句子，难道不需要连词吗？

这个是虚拟语气里的倒装

完整的应该是if it were not。。。，a star would....

see....

thanks