前厅的对客服务区包括()
A.总服务台
B.大堂副理处
C.行李处
D.电梯
参考答案:A, B, C
比75少20的数是( ),比75多20的数是( )。
When the farmers dug the well, they _____ a large collection of ancient china. [ ]
A. came by
B. came around
C. came up
D. came across