Select the correct subordinating conjunction

1. __________ it was raining, we went for a walk. --Select-- although because since

2. He is very tall, __________ his brother is short. --Select-- whereas because so that

3. She left early __________ she should miss the train. --Select-- lest as long as in case

4. You can stay __________ you keep quiet. --Select-- as long as unless though

5. __________ I see him, he is always busy. --Select-- whenever whereas before

6. You can come __________ you are on time. --Select-- provided that before after

7. Finish your homework __________ you go out to play. --Select-- before as soon as while

8. __________ he started working here, he has been promoted twice. --Select-- since as until

9. We will go out __________ the rain stops. --Select-- after until once

10. Stay here __________ I call you. --Select-- until unless as long as

11. __________ you finish your work, you can leave. --Select-- once while because

12. He studied hard __________ he could pass the exam. --Select-- so that in case unless

13. __________ it rains tomorrow, we will cancel the picnic. --Select-- even if unless because if

14. We didn't go out __________ it was raining. --Select-- because although unless

15. She was reading a book __________ he was watching TV. --Select-- while since because

16. Take an umbrella __________ it rains. --Select-- in case unless though

17. You can't go out __________ you finish your homework. --Select-- unless until before

18. He talks __________ he knows everything. --Select-- as if unless while

19. __________ the project is completed, we can start the new one. --Select-- now that even if while

20. __________ he is rich, he is very humble. --Select-- though because if