Tony, ________ is my good friend, Harry.— Hello, Harry.

My teacher said to me with a smile, “Well, you ________ to worry about your lessons.”

__________ does your school have sports meeting?-Twice a year. [ ]

What do you think of the lecture of Li Yang’s Crazy English?-I think it’s , but someone thinks it’s much too .

The doctor advised me to ______ exercises.