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
答案是D，我选了A...不太明白画线句子前面的结构，是倒装了么~？
谢谢啦~
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