10. _________ he didn't come yesterday is unknown.

9. It is said __________Peter will have a chance to travel abroad next month.

8. __________ he was late for class made me angry.

7. __________ you have done might do harm to others.

6. __________ leaves the room last ought to turn off the light.

5. He got caught in the heavy traffic. That was ______ he was late.

4. The question is ______ can complete the difficult task.

3. I wonder _____ you are getting on with your studies.

2. Go and get your coat. It's _______ you left it.

1. The fact is _______ I have lost his address.