兰姆酒（Rum）的酿造原料（）
A、谷物
B、葡萄
C、甘蔗
D、龙舌兰
参考答案：C
His parents ask him _______ on the road because it's dangerous. [ ]
A. to play
B. not to play
C. to not play
D. playing
触电触及断落在地上的带电高压导线，尚未确认有无电前，救护人员不可进入断落点（）范围内。
A、3-5M
B、5--8M
C、10-15M
D、8--10M
