1 . I still remember the day ________I first visited the Great Wall.

A．which

B．that

C．where

D．when

2 . The clever boy made a hole in the wall, ________ he could see ________ was going on inside the house.

A．which; what	B．through which; what
C．through that; what	D．which; that

3 . —Lewis, where is the newspaper _______came yesterday?
—It's under the magazine.

A．which

B．who

C．whose

D．what

4 . The factory produces half a million pairs of shoes every year, 80%_________are sold abroad.

A．of which

B．which of

C．of them

D．of that

5 . He paid the boy $10 for washing ten windows; most of ________ hadn’t been cleaned for ten years.

A．these

B．those

C．that

D．which