21.After the 1980s, the West became Godlike to many Chinese because of ____ Westerners’ wealth, and ____ freedom to do what they wanted.

A./; /

B.the; the

C.the; /

D./; the

22.Our bad living habits will destroy the earth. Only by changing ____ we live can we save the earth.

A. that

B. what

C. how

D. where

23.We______every day for almost two weeks ,so I’ll need to buy a large backpack to carry my supplies .

A.walk

B.have walked

C.have been walking

D. will be walking

24. ——Excuse me, Professor Smith, I was wondering if I could leave a quarter earlier today.

——____.

A.Nothing the matter.

B.Sure, go ahead

C.Oh, why not?

D.No trouble at all