is well known is that Africa had contacts with India and the Red Sea civilizations from th

is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．
A. As
B. It
C. What
D. That

A. AsB. It(答案→)C. WhatD. That解析：考查名词性从句。此题考查的是主语从句，主语从句中缺少主语，所以用what，选C。

对的，就是这个意思

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