—Must I turn off the gas after cooking ? --Of course . You can never be ___ careful with that.

—In early autumn Steve applied for admission to college. He wanted to go      but to Cornell University.—Oh, why not Harvard?

You cannot be ____ careful when you drive a car.

—How do you find this new movie?—It's ________ interesting than expected.

—Did all of the boys go to the cinema?—No.They __________ went to the Internet bar instead.