1. 爸爸太疲劳了，他一躺下就睡着了。

Father was too t       and               as soon as he lied down.

2. 为了节省时间，那位教授只问了我几个问题。

                      , the professor only asked me several questions.

3. 这些年来中国农村发生了巨大变化。 

Great changes               place these years in rural areas of china.

4. 请你说的慢一点好吗？我记不下来。  

1、1. tired, fell asleep        2. To save time     3. have taken

4. Would you mind speaking a bit slowly? I can’t write down.