单选题The split between humans&
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解决时间 2021-03-21 21:08
- 提问者网友:缘字诀
- 2021-03-21 06:42
单选题
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
最佳答案
- 五星知识达人网友:渊鱼
- 2021-03-21 08:04
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。
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- 1楼网友:不甚了了
- 2021-03-21 09:36
好好学习下
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