单选题 After the guests left, she spent as much time as she could ______ the room.
【正确答案】 D
【答案解析】[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“整理，收拾”。故选D。