题目内容
____ is known to us all is that the 2008 Olympic Games will take place in Beijing.
| A．What | B． It | C．As | D．Which |
A
解析试题分析：句意：众所周知，2008 年奥运会将在北京举行。It做形式主语。后面的that从句是真正的主语。
考点: 考查主语从句的关系词辨析。
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