present perfect continuous или past perfect continuous. 1. wake up! you (sleep) enough. it’s time to get up. 2. professor owen is working on two articles for national wildlife magazine. she (write) articles since monday. 3. at last the bus came. i (wait) 20 minutes. 4. we were extremely tired at the end of the journey. we (travel) more than 24 hours. 5. i (read) book you lent me but i haven’t finished it yet.