Trees can keep the air .
A. clean B. beautiful C. hot
She ________in a car factory.
A. work B. works C. working
If you enjoy ________people，you can work for the police.
A. help B. helping C. helps
If you want to buy a pet，you can go to the ________.
A. pet shop B. fruit shop C. shoe store
I ________ sports，but she ________ art.
A. like；likes B. like；like C. likes；likes
A: ________ does she go to work?
B: She goes to work by bus.
A. When B. Where C. How