根据句子意思及所给的词首字母或汉语提示，完成下列单词

1. There are(有) three people(人) in my f__________, my father, my mother and I.

2. My aunt is a n__________. She works in a hospital.

3. The box is very h__________. I can't carry it. Could you help me?

4. Please give me two __________(瓶) of water.

5. I __________(通常) go shopping with my mother on Sundays.

环境卫生学中研究环境与健康时通常采用的方法是（）。

A.环境流行病学与环境统计学

B.环境流行病学和环境毒理学

C.环境毒理学和环境微生物学

D.分子生物学和环境流行病学

E.环境毒理学和卫生学