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III. Combine each pair of sentences, using the given words in brackets.
1. Lan has learnt English. She was a small girl. (since)
2. Don’t go anywhere. I come back. (until)
3. Cars were discovered. People used horses and bicycles. (before)
4. I am going to speak with the boss. The meeting ends. (when)
5. She lived in England. She had studied English. (before)
6. I have lost touch with him. He left London. (since)
7. My mother is washing the dishes. My father is watching television. (while)
8. I won’t return my book to the library. I’ll finish my research project first. (until)