Ответ:
2. Sarah looks exhausted. What has she been doing today?
3. How many times has Matthew visited New York?
4.My friend has been learning Italian for three years, but he still can't speak fluently.
5. The kids have been watching cartoons for two hours.
6. Has Sam been studying hard hard this week?
7. Peter has never played The Sims.
8. Sorry for being late. Have you been waiting for long?
9. They haven't seen Mary recently.
10. Andrew has been writing his essay all day, but he hasn't finished yet.
Объяснение: