题目:
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.
选项:
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