第二部分：英语知识运用 （共两节，满分35分）
第一节：单项选择 （共15小题；每小题1分，满分15分）
请认真阅读下面各题，从题中所给的A、 B、 C、 D 四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
21 —How many people are still leading ___life under ___poverty line in the world?
—Perhaps one fourth.
A. the; 不填 B. a; the C. a; a D. 不填; 不填
22. —Would you like to join us in the game?
—_____, for I have something important to attend to.
A. I will B. I’d love to C. I won’t D. I’m afraid not.
23. We _________ him to stop surfing the internet, but he wouldn’t.
A. persuaded B. tried to persuade C. suggested D. demanded
