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，满分15分)
从每题所给的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．The CPI went up sharply，as was reported in the newspaper，mainly due to 20 percent rise in food prices．
A．／；／ B．a；the C．／；the D．a；／
22．—He should have been warned of the danger．
— ，but he wouldn't listen to me．
A．Yes，he shouldn't B．So he should C．So was he D．So he was
