、Tom is a top student in our class , How        it be that he was a failure in the last exam?

My uncle _________ drive a car two years ago. Now he drives very well. 

——Must I leave the room now?——No，you    .

—Why didn’t you come to my birthday party last night? —I planned to, but my parents simply 　　　   not let me out so late at night.

Please remind your grandpa to take medicine on time, for a man of his age ____be very forgetful．