Like any star of similar mass would do, once the Sun has exhausted the hydrogen in its core, it expands into a red giant, eventually ejecting its outer envelope of gases to become a white dwarf.
A. Like any star of similar mass would do, once the Sun has exhausted the hydrogen in its core, it expands into a red giant, eventually ejecting
B. Like any star of similar mass, once the hydrogen in the Sun’s core is exhausted, then it expands into a red giant and eventually ejects
C. As in the case of any star of similar mass, once the hydrogen in the Sun’s core is exhausted, it will expand into a red giant, and eventually ejecting
D. As any star of similar mass would, once the hydrogen in the Sun’s core is exhausted it will expand into and will eventually eject
E. As would be the case with any star of similar mass, once the Sun exhausts the hydrogen in its core, it will expand into a red giant and eventually eject
这道题的prep给的答案是E，我开始选D，虽然没有省略后面的will，但是觉得E的As would be the case with……是否太繁琐了，还有d的will必须省略吗？
Ｄ once the hydrogen in the Sun’s core is exhausted ，it will expand into and will eventually eject
中间要用＂，＂隔开的吧，而且改变了句意思expand into a red giant（原句有的，不能省掉）
The key problem with D is the referent for "it", what is the referent for "it"?
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