补全对话，每空一词。

Hector :     1    are you doing for vacation, Linda?

Linda:  I'm going to Jilin    2     a week.

Hector: That    3      interesting!  What are you doing there?

Linda: I'm    4     hiking in Changbai Mountains. How    5    you?

          What are you doing for vacation?

Hector: I'm visiting my friend in Sanya.

Linda: Oh yeah?   6          7     are you staying？

Hector: Only for three weeks. I don't like going away for too     8    .

Linda: Well,     9    a good time. Show me your photos when you    10     .

我国遴选OTC药物的基本原则是

A．应用安全，质量稳定，疗效确切，应用方便

B．安全有效，质量稳定，经济合理，临床必需

C．临床必需，应用安全，疗效确切，应用方便

D．临床必需，安全有效，价格合理，应用方便

E．临床必需，应用安全，经济合理，应用方便