( )1. —Fined $20! You know you ________ 100 km an hour，don’t you?
—No，officers. I can’t have been. This car doesn’t do 80.
A．are driving B．have driven
C．had driven D．were driving
( )2. — How can you use my computer without permission?
— Oh，I ________ to tell you. I hope you don’t mind.
A．forget B．forgot
C．have forgotten D．am forgetting
