据考究，我国古代寓言早在（）己初具雏形。
A.夏商
B.殷周
C.春秋
D.战国
参考答案：D
--- Tom, would you do me a favor? I’m in a mess.
--- _______. I’m just answering a call.
A．Of course
B．Not at all
C．With pleasure
D．Wait a minute, please
请完成形成“铁锈”和“饱和溶液”的条件，将适当的词语填在方框内．
