--- This math problem is _____ hard for me to understand. Can you help me ?----Sure. It’s my pleasure.
I was surfing the Internet my brother was doing his homework.
There is with my computer, so I can’t finish the work on time today.
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.