Question

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

A.AsB.WhichC.ItD.What

Answer 1

【答案】C

【解析】

考查it做形式主语。句意：我们知道琥珀屋是俄国人的。句中that the Amber Room belongs to the Russians.是主语从句，用it做形式主语。故选C。