第二部分：英语知识运用（21-55）（共两节，满分45分）
第一节：语法和词汇知识（21-35）（共15小题；每小题1分，满分15分）
21. If you take __________risk of not wearing a seat belt, you will be at __________risk.
A．/; / B．/; the C．the; / D．the; the
22．—Will you read me a story, Mummy?
—OK. You ________ have one if you go to bed as soon as possible.
A．might B．shall C．must D．could
23．—John always thinks of others instead of himself.
—So she does. It is __________ of him to offer help to others.
A. aggressive B. ridiculous C. typical D. stressful
24．__________ was known to us all that Tom had broken his promise __________ he would give each of us a small gift.
A．It; that B．What; that C．As; which D．It; which
