The wolves are _____________ the hole.[ ]
A. on
B. of
C. with
D. in
答案：D
Why not describe what you saw that day___? It will surely help the police to find out who were to blame for the terrible accident.
A．in order
B．in return
C．in detail
D．in charge
数据流图的类型有 【4】 和事务型。
