1. John blew up the tires of his bicycle.
2. We'd leave them a note in case they arrive late.
3. Before he came here, Mr.Smith was his previous boss.
4. He has an extreme command of German.
5. There is no justification for his criticisms.
6. I am baffled by their reluctance to sign the contract.
7. Chess problems like that always defeat me.
8. You mustn't let anyone else know this.
9. I can't afford a new dress. I will have to make do with that old blue one.