根据句意及所给中文提示、首字母或英文解释，写出句中所缺单词。

1. Lucy is studying in a ___________ (混合的) school.

2. I love the ___________ (味道) of chocolate.

3. I __________ (想知道) when and where they will have a picnic.

4. My aunt __________ (丢失) her ticket last night and she didn’t see the movie.

5. He answered the question c___________. How happy he looked!

6. Granny Li is in hospital and she looks so __________ (not strong).

7. —Who is your ___________ (someone you admire very much)?

—The badminton player Lin Dan is. He got many medals. 

对于印刷企业而言，纸张的成本属于（）

A.直接材料成本

B.制造费用

C.配送费用

D.研究费用