问题
单项选择题
All the staff members of the department made concerted efforts to ______ the hall for the Christmas party.
A．clean up
B．clear up
C．dress up
D．make up
答案
参考答案：A
解析：clean up“彻底清扫”；clear up“天晴起来”；dress up“打扮起来”；make up“化妆”。从句子意思上看，只能选clean up。