英语选择题（说下理由）
问题描述：
英语选择题（说下理由）
31.______ is natural,he married Mary.
A.It B.What C.Which D.As
答
D正如,就如
很自然的,他和Mary结婚了.
用法和As is known to us 众所周知的……
As is reported in the newspaper 就象报纸报道的一样……
这类用法,As不可以和Which 替换.
没有用It来连接两个句子的.