21. I want to take a driving test. As you know, in Hengshui, ______ car is getting to be _____ popular means of transportation.
A. the; a B. a; 不填 C. the; the D. a; the
22. Scientists believe native Americans arrived by crossing the land bridge that connected Siberia
(西伯利亚)and________ more than 10,000 years ago．
A. this is Alaska B. Alaska is now C. is now Alaska D. what is now Alaska
23. They _____ two free tickets to Canada, otherwise they’d never have been able to afford to go there.
A. had got B. got C. have got D. get
24. _____ help if you can, and our country will improve more quickly and better.
A. Giving B. Give C. Given D. To give
