21. - How do you usually come to school?---- I usually come to school _________.
A. take the bus B. by bus
C. by the bus D. take a bus
22. Is your bike as mine?
A. same B. some C. a same D. the same
23. — do you go to the movies?
—Once a week.
A. How many B. How much C. How often D. How soon
24. —Do you often brush your ? —Yes, I do.
A. tooths B. teeths C. teeth D. tooth
