1 Last summer we visited the Three Gorges Dam,( ) Hubei Province is famous for in the world

题目

1 Last summer we visited the Three Gorges Dam,( ) Hubei Province is famous for in the world
填关系词
2 Why do you look so depressed
My company has come to the point（）a change is badly needed
A .where B.when C.what D.that
3.Jack is as busy as a bee amd never seems to spare a minute until after 11:30 pm ,( )his family have been asleep.
A.before it B.by which time C.by then D.at which time

答案

第一题,which 做介词FOR的宾语,所以用关系代词,又是指物且是非限制定语从句,故不可以用THAT,只有which了.
第二题.A,抽象的地点先行词,定语从句中需要状语
第三题.B定语从句中需要时间状语,A,C都不是定语从句,介词用BY表示“在.之前：符合语法和语义