Micro-letters (Weixin) will be charged has not been decided yet.

Clean-Up Day is coming. How to let more people know itWe could ______ advertisements（广告）after school.

taking action, but how effective itwill remain _______.

I will never understand how it thatyou were an hour late on such a short journey

Frank ,be quiet ! Don’t_____ your grandpa .–I’m sorry , Grandma.I don’t know he’s still sleeping now .