--- When Mary’s birthday? --- It’s September.A. am; on B. is; in C. is; on
Don’t worry. There is ________ time left.
Everyone ______ be polite to the old people.
---Could you tell me when Mr. Li _______ in Changchun? ---Sure. When he _______, I’ll call you.
Kids _________ use the computers to draw in the future.
---Will there be more people in 100 years? --- __________, I hope.