1. 根据句意，从方框中选出适当的词或词组填空，每个限用一次。

although, what, because, so that, if, until, that, before, since

1. （1） Nick didn't come here yesterday he had to look after his sister.
3. （2） Gina has been here for 10 years she came to China.
5. （3） I wonder I can get some advice from you.
7. （4） the woman is very poor, she feels happy.
9. （5） They keep exercising they can win in the match.
11. （6） My parents didn't have lunch I arrived home.
13. （7） Please knock at the door you come in.
15. （8） Could you tell me your job is?
17. （9） Susan said she wasn't interested in it.