---What should I do for the health of my teeth, doctor?
--- Well, it’s best to ______ your teeth before you go to bed.
A. blow B. wash C. brush D. break
---_____ can we protect the environment in our daily lives?
--- As for me, I think we are supposed to use both sides of paper and try not to use plastic bags.
A. How B. Why C. When D. Where
--- Hey, Eric! What has happened?
--- The lift is broken again! You know, I live on the _________ floor.
A.twelve B. two C. twice D. twelfth
---I’m too nervous to give a speech before so many people. ---_______, Maria. You can do it.
A.That’s true B. With pleasure
C. Come on D. You’re right
Mom added some salt into the soup, ______ it still wasn't salty enough.
A.so B. and C. but D. or
Swimming can be ______ exciting sport for kids in summer.
A./ B. a C. an D. the
