根据句意、汉语或首字母提示，补全单词，完成句子。

1. Oh,Jack, your hair looks dirty. Why not buy some s ____ and give it a thorough clean?

2. An advertisement which begins with the      (神奇的)word "free" can rarely go wrong.

3. Sir, could you please tell me where I can buy some f       vegetables and fruit?

4. You may find it hard to get a____(公共卫生间)in some big cities.

5. We might as well eat something at the        (小餐馆)nearby.

催化剂密相装填时，可以采用（）作为催化剂装填的推动力。

A、人力

B、压缩空气

C、压缩氮气

D、机械动力