Раскройте скобки, употребляя глаголы 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.

1) have been working.2) have been playing.3) has already done.4) have been waiting.5) have already read.6) has been writing.7) has been helping; have already washed; have dusted.8) Have you found; have been looking; haven't found it yet.9) has been playing.10) have slept.