There______ a number of natural mysteries in the world that even make scientists ______.A．exists; confusingB．are existed; confusedC．exist; confusedD．exist; -高中英语-n多题

◎ 题干

There______ a number of natural mysteries in the world that even make scientists ______.

A．exists; confusing	B．are existed; confused
C．exist; confused	D．exist; confusing

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◎ 解析

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◎ 知识点

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