Tom is a good boy. He often helps his mother______ housework.
A. doing B. do C. did
Yesterday Liu Yun____ a mountain with her parents.
A．climbed B. climb C. climbing
Amy is a teacher, she _____ English.
A. teach B. teaches C. teacher
What _____ she like to do?
A. do B. does C. is
Where does the ____come from ? It comes from the clouds.
A. rain B. sun C. cloud
What are you going to do ______Sunday?
A. on B. at C. in