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题目
题型:不详难度:来源:
The split between humans and living apes is thought by some scholars ____ 15 to 20 million years ago.
A.to occurB.occurringC.to have occurredD.having occurred

答案
C
解析
本题考查非谓语动词。 be thought to do“被认为做某事”,因为后边是 15 to 20 million years ago 已经发生了,因此用不定式的完成式。
核心考点
试题【The split between humans and living apes is thought by some scholars ____ 15 to 】;主要考察你对现在分词等知识点的理解。[详细]
举一反三
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A.causesB.causeC.causedD.causing

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A.the doorbell rangB.we heard the doorbell ring
C.there was someone knocking at the doorD.the doorbell was ringing

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