A、B、C、D、使用碘酒小的要浸泡（）。
A、0.5-2小时
B、2-3小时
C、5-10小时
D、24小时
参考答案：A
We were all very much attracted by the beautiful scenery _____ we set foot in the village. [ ]
A. quickly
B. suddenly
C. finally
D. immediately
单位印章是单位对外行使权利的标志，起着( )作用。
A．保障
B．权威
C．凭证
D．联络
