What should I do, doctor?
________ healthy , you should take more exercise.
| A．Keep | B．Keeping | C．To keep | D．Kept |
——What about ____sightseeing this weekend ?
—— That sounds interesting!
A. go B. to go C. going
Tom's brother is ______ than him.
A. out goinger B. more outgoing C. most outgoing
It takes my mother one hour ______ to work
A. go B. to go C. going
I often go to school ______.
A. by bus B. by buses C. by a bus
It’s important _______ us __________English well.
A. of, learning B. for, to learn C. of, to learn