根据句意，用适当的单词填空

1. My sister is __________, so I have take good care of her at home.

2. __________ the end of the day, we clea'ned the classroom and left for home happily.

3. I don't have __________ money to buy such an expensive MP5 player.

4. Peter,  this is my new car.  Would 'you like to go for a __________ with me in this' afternoon?

5. You should __________ your answers before you hand in(上交) your papers.