Now the air in our city is ______ than it used to be. Something must be done to stop it.
A. good B. better C. worse
—________ do you go to the library, Linda?
—Every week.
A. How long B. How often C. How soon
— Excuse me, whose French book is this?
—It be Tom’s. In our class, only he is studying French.
A. must B. can’t C. May
—Shall we go for a hiking this weekend?
—All right, it rains.
A. if B. unless C. until
I like the teacher is strict with us.
A. that B. whom C. whose
My grandmother is ill. I have to ________ her.
A. look at B. look after C. look for
