12. We’re leaving for Shenzhen _______ it is fine today.

11. _______ this method doesn’t work, let’s try another.

10. They couldn’t send their children to school _______ life was very hard in those days.

9. Take the medicine _______ you go to bed.

8. We should strike _______ the iron is hot.

7. I won’t believe it _______ I hear with my own ears.

6. She went to bed _______ the TV play was over.

5. The soldiers set off to the front ______ they received the officer’s order.

4. He didn’t go to bed ______ he finished his homework.

3. I was cooking ______ she knocked at the door.