从A、B、C、D 四个选项中，选出与所给句子画线部分意思相同或相近并能替代的那一项，然后填写在括号里。

1. Yesterday he got a letter from his father. [ ]

A. heard of

B. heard about

C. heard a letter from

D. received a letter from

2.  —Are you happy to have two-month summer holidays?

     —Sure. We can relax ourselves and do many things we like.  [ ]

A. two months

B. two month

C. two months

D. two month's

3. Would you like a cold drink rather than coffee? [ ]

A. would than

B. would rather

C. instead

D. instead of

4. I'm sorry she isn't here right now.  [ ]

A. then

B. at the moment

C. just now

D. at this time

5. When you cross the road, be careful.[ ]

A. across

B. go through

C. go cross

D. walk across

将人体实验分为临床性与非临床性研究并提出不同道德原则的医德文献是（）。

A.“东京宣言”

B.“悉尼宣言”

C.“纽伦堡法典”

D.“赫尔新基宣言”