With the help of the teacher, he decided _______ in class.
A:not to talk
B:to not talk
C:talk
D:not to talking
已知煤油的密度是0.8g•cm﹣3,试根据金属钠的保存方法和金属钠与水反应的现象推断金属钠的密度( )
— ________ I finish my homework now?
— No, you ________.
把33枝花,平均扎成6束,每束几枝花,还剩几枝?