Exercise 3. Paying attention to the meanings of the sentences, fill in the blanks with the correct subordinate conjunctions or similar expressions chosen from the pairs given in brackets. For example:
1. We recognized her at once, ____________ we had not seen her for years. (although, in case)
2. He kept reading ___________ he fell asleep. (for, until)
3. The moon will rise ____________ the sun sets. (as soon as, than)
4. It looks ____________ the train will be late. (while, as though)
5. ____________ she got her degree, she became a teacher. (After, Than)
6. We will not go skiing ____________ the weather is good. (as if, unless)
7. ____________ he left, he made sure he had his keys with him. (Before, For)
8. ____________ I told the truth, you would not believe me. (Even if, So that)
9. They have known her ___________ she was a child. (until, since)
10. I must leave now, ____________ I have a great deal of work to do. (as, than)
11. What shall we do ____________ it rains? (or else, supposing)
12. ____________ you read this book, you would be sure to enjoy it. (If, Until)
13. The door was open, ____________ we could hear everything. (in case, so)
14. I studied more ____________ he did. (than, whereas)
15. We packed a lunch, ____________ we knew we would soon be hungry. (lest, for)
16. I will join you, ____________ the weather is fine. (providing, than)
17. ____________ he is very busy, he is seldom at home. (Or else, Because)
18. We must hurry, ___________ we will be late. (so that, or else)