第15题: [单项选择]After the guests left, she spent as much time as she could ______ the room. A. tidy up B. to clear away C. clear away D. tidying up 参考答案:D 答案解析:本题测试spend的用法,spend (in) doing sth.。但是由于as she could这个从句正好在所填空的前面,很容易误导考生使他们看到could后面就加动词原形。tidy up意为