6. The pupils (learn) this lesson when he (come). 7. While Mr. Green (read) the letter, he ( hear) a knock at the door. 8. Where (be) Jack at that time? He ( listen) to the radio in the living-room. 9. Mrs.Wilson (have) an accident while she (drive ) to the work this morning 10. When I (see) them, they (write) some words on the wall. ...
