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题库 / Prep2007E1-SC-136
It seems likely that a number of astronomical phenomena, such as the formation of planetary nebulas, may be caused by the interaction where two stars orbit each other at close range.
may be caused by the interaction where two stars orbit each other
may be caused by the interaction between two stars that each orbit the other
are because of the interaction between two stars that orbit each other
are caused by the interaction of two stars where each is orbiting the other
are caused by the interaction of two stars orbiting each other
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D where错误
C 错误 because of 不可以放在be 动词后面，必须与normal verb连用 唯一的例外是强调句型。It is because of X that Y verb
"because of" can't follow a form of "to be". it has to follow a normal verb.
today's delay is because of the rain --> incorrect
the train was delayed because of the rain --> ok
2) because of…的表达不及动词形式cause更有效。
(A) may与likely语意重复;此处不应该用关系代词where，因为没有明确表示地点。
(B) may与likely语意重复;each…the other搭配错误。
(C) be because of sth不及动词形式be caused by更有效;each…the other搭配错误;where用法错，原因与A选项相同。
(D) where用法错，原因与A选项相同;each…the other搭配错误。
(E) 正确，be caused by简洁有效地表达原因，现在分词orbiting…作后置定语修饰名词stars。
because of 后面只跟简单名词，排除C；剩下BE，实在没想到重复语义···likely和maybe😭
because of 不能跟在be后面，必须跟着一个normal verb，相比之下caused by更有效力
It seems likely that a number of astronomical phenomena, such as the formation of planetary nebulas, may be caused by the interaction where two stars orbit each other at close range.
where的用法师错误的，没有地点
名词和ing的区别在于ing侧重于过程，名词侧重于结果，ing的动作在句子中没有明确的结束时间点，名词则有明确的结束时间点，如：
(1) Exploring the cave is taking a long time.
(2) The exploration of the cave took three days.
句(1) 中我们完全看不到“探索山洞”这件事的终止点，只是知道已经花了很长的时间了，可能还将继续花很长的时间；句(2)中，主句部分已经用过去时表明“花费了3天”，由此可知，“探索山洞”这件事已经完结了，具备明确的时间终点。
不是某物是因为……，是某物发生什么情况是因为……，如：He do it because of money. 为钱而做事，