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题库 / Prep2008E1-SC-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.
instead its own weight would cause a star to collapse
instead a star would have collapsed under its own weight
a star would have to be collapsing under its own weight
a star would collapse under its own weight
its own weight would have caused a star's collapse
题目分析：
略。
选项分析：
A选项：语法有误，虚拟语气句子，主句必须一开头就是主语，而不能是连词、副词，因此instead错误。
B选项：instead错误同选项(A)。
C选项：would have to be collapsing是很混乱的时态；would have to是不很肯定的语气，其表达的是have to do的内容只是一个假设，并不是真的“必须”，而have to表达的意思是，要做的事情非常重要，“必须”去做，前后矛盾。
D选项：Correct. 本选项在语法和逻辑上均是正确的。
E选项：名词短语a star’s collapse需改为不定式短语a star to collapse，这点考查了不定式和名词的区别，用之于本题，显然地，cause的约束力较强，身后应用不定式做宾语和宾语的补足语。
1.句子结构，这是个强调句啊！要不是因为....，星星就可以...
后面一定要是个完整的句子，而且主句必须一开头就是主语，AB错
2.动词时态，CE的have肯定是错的。
3.句意推理，have caused a star's collapse，E的这个句意错了，是哪个星星的？不是他本身？E错
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