Ⅱ. 单项填空（共15小题; 每小题1分, 满分15分）
21. He walked _______ the street so hurriedly that he knocked into a small boy.
A. across B. over C. through D. at
【解析】选A。句意为“他过马路时太着急了, 撞到了一个小男孩”。across意为“横过, 穿过”, 着重指从表面的一边到另一边。
22. Those successful deaf dancers think that dancing is an activity _______ sight matters more than hearing.
A. when B. whose C. which D. where
【解析】选D。考查定语从句中关系副词的用法, 从句中缺少地点状语, 故选择where。句意为：这些成功的聋哑舞蹈者认为：舞蹈是一项视觉比听觉更重要的活动。
