问题补充:
单选题Thesplitbetweenhumansandlivingapesisthoughtbysomescholars____15to20millionyearsago.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。
时间:2021-05-09 14:46:50
单选题Thesplitbetweenhumansandlivingapesisthoughtbysomescholars____15to20millionyearsago.A.to occurB.occurringC.to have occurredD.having occurred
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。