用所给动词的适当形式填空。
1. By the time I ______ ( get ) home, Mother ______ ( finish ) cooking.
2. _______ you _______ ( listen )to tapes yet? No. I _______ (listen) in an hour.
3. You are interested in (drawing). You might _____ (become) an artist in the future.
4. What ______ your little brother ______( do )? Don't speak so loud. He _______.( sleep )
5. The new teacher who _______ ( teach ) us chemistry ______ just_____ ( walk ) into the classroom.
