Susan is my good friend and she always helps me _______ my Maths.

My mother often cooks delicious (美味的)food______ us.

We have lessons _____ 7.30 a.m ______ 11.30 a.m.

I like playing balls ______ basketball, football and pingpong.

World No Smoking Day is ________ May 31.
A. in                    B. on                C. at

—Hi, where are you       ?
—Wenshan

—What’s that     English .
—It’s an egg.

-How do you usually go to work, Miss Green?
--I usually go to work ___ foot, but sometimes __ my bike.

The Olympic Stadium in London was opened       May 5.

Mary was disappointed when she found out they had gone to the cinema_____ her.