Question

【题目】_____ is known to all that the Amber Room belongs to the Russians.

A. As B. which

C. It D. What

Answer 1

【答案】C

【解析】试题分析：考查it用法。这里的it是形式主语，真正的主语是后面的that引导的主语从句that the Amber Room belongs to the Russians。句意：众所周知，the Amber Room属于俄罗斯。故C正确。