① How much is it? ____     A. OK. Here you are.

② Can I try them on? ____     B. It's $89.

③ Is it too expensive? ____     C. It's very pretty.

④ How do you like this skirt? ____     D. Yes，it is.

两次世界大战给世界人民带来了巨大的灾难，同时引起世人对“战争与和平”的深刻思考。据此回答下列问题：

下列句中划线成语使用不恰当的一项是  (      )  

下列能说明生物能对外界刺激作出反应的是（  ）