第二部分英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题，每小题1分；共15分）
从A、B、C、D四个选项中选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21.This bag is twice ______ weight of that one. You’d better carry ______ lighter one of the two.
A. /; / B. a; the C. the; the D. the; a
While there are quite a few differences in the education system, in many countries education is ____.
| A．usual | B．regular |
| C．normal | D．universal |
Some plants are vey ____ to light; they prefer the shade.
| A．sensible | B．available |
| C．adjustable | D．sensitive |
—Can those ____ at the back of the classroom hear me?
---No problem.
| A．seat | B．sit | C．seated | D．sat |
—Can I pay the bill by check?
--- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.
| A．shall | B．mustn’t |
| C．can’t | D．will |
I’m glad you told me about the concert being cancelled. ____ I’d have traveled all the way to Beijing for nothing.
| A．Therefore | B．Otherwise |
| C．Besides | D．However |