关于子宫平滑肌瘤的描述，正确的是（）。

A.多见于更年期妇女

B.可生长于子宫任何部位

C.有明显包膜

D.变性、坏死等继发性改变仅见于供血不足时

E.常发生恶变

— I think smoking is bad for your health. You see the sign "No Smoking" there.

— Yes, I know. But I simply can't _____. [ ]

A. give it away

B. give it in

C. give it out

D. give it up