The school shop,__________ customers are mainly students, is closed for the holidays.
---- Have you heard of the song Little Apple? ---- Yes. It ______ every morning when aged people do square dancing downstairs.
We advise parents _____ their children at home alone in order to keep them away from danger.
---- So far, Su Binglan is the only Chinese who finished the 100-meter race in less than 10 seconds. ----- ______ he runs!
Look! The traffic light has turned red. We _____ stop our car.
---- Sir, Jenny wants to know when she can leave the office. ----- Only when she ______ copying this report.