This is __________ ruler. That’s __________ eraser.A. a, a B. an, an C. a, an
I ____my school ID card at home. May I go home and get it?
____________ Davy called me, I was sleeping.
Clean-Up Day is coming. How to let more people know it? We could ______ advertisements(广告)after school.
You could ask the teacher for help. ________________ Teachers are always helpful.
--- My dream is to be a scientist. --- Sounds good. I hope it will .