捞油区通常分布有（）捞油井。
A、单口
B、多口
C、单口或多口
D、抽油机井和
参考答案：B
— Hey, Ted! You _____ never play in the street. It's not safe.
— Sorry, Mum. I won't again. [ ]
A. need
B. must
C. can
D. may
以牧业为主也从事农业的民族是？
