Exercise 4. Supply the suitable form of the infinitive of the verbs in brackets after can and could. 1. We'll go away

1. We\'ll go away together if you like. We can easily catch the 3:40. 2. He was so weak that he could not lift his head. 3. How could you have made such a mistake as to suppose that I was younger than you? 4. I don\'t believe a single word of his; he can\'t fail to learn the news before us. 5. What, can she still be sleeping? 6. She has a university education and could have made a career for herself if she hadn\'t married. 7. He could have bought a new car if he had managed to save enough money. 8. Our baby was only nine months but he could stand up. 9. Boris was an excellent tennis player. He could beat anybody. 10. What could have put such an idea into your pretty little head?