单项选择题
You should keep the milk in the ice box,() it will go bad.
A. so B. or C. and D. but
单项选择题 关于烟草专卖违法行为,表述错误的是()。
单项选择题 Don't forget to bring your umbrella ()you go out
单项选择题 既能开窍醒神,又善活血通经的药是:()