Раскройте скобки в нужном времени.
1.My sister (to do) grammar exercises at the moment.
2. She (to sleep) after her lessons.
3. When she (to leave) yesterday?
4. Children (to drink) apple juice every morning.
5. Mike (to be) a student last year.
6. Look! She (to ride) a bike.
7. You (to be) a good friend.
8. It (to be) difficult to do this exercise.
9.What your friends (to write) yesterday?
10. My parents (to work) every day.