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Exercise 3.
1. Where is he going now? 2. Who was preparing to the exams yesterday? 3. When will the lesson be over? 4. How old shall I be in a year? 5. What are there on my desk?
Exercise 4.
1. The students were in the reading hall. / The students will be in a reading hall. 2. I was glad to meet my friend. / I will be glad to meet my friend. 3. He was eighteen. / He will be eighteen. 4. My friend prepared to enter the University. / My friend will prepare to enter the University. 5. Such problems were discussed at our meeting. / Such problems will be discussed at our meeting. 6. The train was to arrive at 10. / The train will arrive at 10. 7. My friend was a doctor. / My friend will be a doctor. 8. They were in Moscow. / They will be in Moscow. 9. The book was translated into English. / The book will be translated into English. 10. Pete was waiting for you. / Pete will be waiting for you.