第21题: [单项选择]I sat near the entrance for a long time {{U}}expecting{{/U}} him, but he didn't arrive. A. waiting for B. waiting C. looking for D. watching 参考答案:A 答案解析:expect“期待”;wait for“等待”;look for“寻找”;watch“盯着”; wait是不及物动词,其后不能直接接宾语him。句意:我坐在入口处很长时间等待他的到来,可是他没来。