1. We won’t succeed in testing without being helped. 2. We want you to look at our car. 3. He bought a new car instead of trying to fix his old one. 4. We consider him to be a good expert in this field. 5. We do not know of his having discovered this law. 6. I do not insist on our using this equipment. 7. Our decision will depend on your being ready to help us. 8. I insist on your checking this device immediately. 9. If a job is worth doing it should be done properly.