一Oh, so many people are standing outside the hall. _______will the film start?一__________seven o’clock.
—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.
Look left and right before you ________the road.