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．—Do you think Yao Ming plays a decisive role in his team now?
—_____. Rocket has lost most of the matches in which Yao didn’t play.
A．I can’t agree with you more B．I don’t think so
C．Not really D．That’s all right
22．Obama was elected president last year, who is first black president of U.S.
A．/, a, the B．the, the, / C．the, a, / D．/, the, the
