—______ I smoke here?—No. You are not allowed to smoke in public places.
Tom is a good boy and he writes _________ in his class.
—Which colour do you like _______, blue or green? —Blue.
—______ you help me mend the radio? —Yes, I can.
There is ______ wrong with this computer. It doesn’t work.
Parents often ask their children _____ their Internet friends because they may be in danger.