一根据首字母或中文提示，在空格处填入一个恰当的单词，并注意形式。
1. Most vegetables and fruit are p________ food, which helps the body fight diseases.
2. He has been working for a long time, but h e is still full of e_____________.
3. When she found some old photos in a small box, Li Mei s______ for her lost youth.
4. In order to stay s____________, she eats very little every day.
5. Many shops and restaurants will give you some (折扣) if you pay by credit card.
6. There would be long talks about the strengths and _______（弱点）of each player.
7. We aim to offer good quality and service to all our ____________(顾客).
8. Once the __________appeared to ask if we were enjoying our m eals, I managed to give her a silent nod.（女主人）
9. There are many types of wild _____________(蘑菇) and some are poisonous.
10.The steel factory has been supplying us with ____________(未加工的) materials二、 用括号中所给词的适当形式填空。
