酒吧服务员在营业前（），应保持良好的仪容仪表，以恭候客人的光临。
A.5min
B.10min
C.20min
D.30min
参考答案：A
Your donation _____ and the money will be used to help the students from poor families. [ ]
A. is greatly appreciating
B. appreciates
C. has appreciated
D. is greatly appreciated
船在系泊中，横缆的主要作用是：（）
A.阻止船舶向前移动
B.阻止船舶离开码头
C.阻止船舶向后移动
D.阻止船舶前后移动
