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Раскройте скобки, употребляя гла¬голы в одном из следующих времен: Present Perfect, Present Perfect Continuous.
1. They (to work) there for already three hours. 2. They (to play) since break-fast time. 3. She already (to do) her homework for two hours; but she (not yet to do) half of it. 4. I (to wait) for you since two o'clock. 5.I already (to read) sixty pages. 6. He (to write) books since he was a young man. He al¬ready (to write) eight books. 7. Today she (to help) her mother since morning. They already (to wash) the floor and (to dust) the furni¬ture. 8. You (to find) your note-book? — No! I still (to look) for it. I already (to look) for it for two hours, but (not yet to find) it. 9. You (to play) with a ball for already three hours. Go home and do your homework. 10. Wake up! You (to sleep) for ten hours already.