选用if, unless, although填空。

1．I will tell him ________ he comes．

2．She went on with her work ________ she was very tired．

3．________ he doesn't come before 12 o'clock, we won't wait for him．

4．________ she has a lot of money, she is unhappy．

5．You will not be successful ________ you work hard．

6．We will go on a picnic ________ it rains．

7．________ she has only one son, she sent him to the army．

8．________ it was late, he was still working．

9．________ she is not the boy's mother, she loves him as much as she loves her own child．

10．________ it is fine tomorrow, I'll ride a bike there instead of taking a bus．