用适当的介词、副词或连词完成下列句子。

1. Add your scores ____ and we'll see who will win.

2. He can't go with you to the cinema ____ he finishes cleaning his bicycle.

3. How concerned her mother was ____ her study at school!

4. ____ walking his dog in the morning, he came across an old friend of his.

5. Annie and her family hid away for nearly twenty-five months ____ they were discovered.

6. Annie didn't want to write down a series of facts in her diary ____ most people had done.

7. It is along the river bank ____ he takes a walk every morning.

8. The sick pupil who had left school long grew so crazy about everything to do ____ school life.

9. Sorry I can't go with you. I'm suffering ____ a bad headache.

10. Mother asked the child whether he was very hot with so many clothes____.