烟草属可分为（）、红花烟和碧冬烟三个亚属。
参考答案：黄花烟
— I've been working really hard at English recently, but it still remains poor.
— Don't give up. Sometimes things don't _____ like you want right away. [ ]
A. turn out
B. turn up
C. turn down
D. turn in
所有权
