12. As soon as I (to see) him, I (to understand) that he (to work) hard. He (to write) something and (not to notice) anything. 13. When I (to come) home yesterday, the children (to run) and (to sing) merrily. “We (to learn) a new song!” they cried. 14. When the young man (to enter) the room, she (to look) at him in surprise. “What you (to want) to tell me?” she (to say). “Why you (to come)?” 15. It (to rain) hard when I (to leave) home yesterday, so I (to return), (to put) on my raincoat and (to start) again. 16. You (to work) right now? — Yes, I (to prepare) for the English exams.