老师买了96朵花，每个花瓶插8朵花，需要几个花瓶？
96÷8=12（个）
答：需要12个花瓶．
The door burst open and , shouting with anger. [ ]
A. rushed in the crowd
B. in the crowd rushed
C. the crowd in rushed
D. in rushed the crowd
-3，-2， 1， 6， ( )
A．8 B．11 C．13 D．15
