1. He (wait)______ all the morning. 2. Richard _______(do) the same Jjob for 2O years. 3.I_______(study) English for six months. 4. Mike _______(work) in Las Vegas for the last few months. 5. It ______(rain) since lunchtime. 6. Helen______ (read) this book for three days. 7. Kevin______ (look) for a job since he finished school. 8. I’m tired of waiting. I_________(sit) here for one hour. 9. He is exhausted becausce he ______(work) continuousÌy for more than twelve hours. 10.She_______(sleep) for 10 hoursl You must wake her. 11.He _______(read) this book for two hours, but he hasn"t finished it yet. 12. That boy _______(wait) for the bus for half an hour. Shall I tell him that the last bus has already gone? 13. They ________(argue) very excitedly all this time. Shall I come and interrupt them? 14. What have you done with my bag? I_______ (look) for it for an hour and I haven’t found it yet. 15. I_______ (think) over what you said since yesterday.