When does your aunt usually _____ home?[ ]
A. gets
B. get
C. get to
D. go to
答案:B
—________ do you surf the Internet?
—Once a week, at least. [ ]
A. How
B. When
C. How often
D. How many times
车站应设在线路()的宽阔处。
A、平道
B、变坡点
C、平道、直线