If you want a ticket for a round-trip, you'll have to pay ______ $ 100.
A.more B.another C.other D.each
I like to live in a house ______ is big and bright.
A.that B.who C.how D.where
The Olympic Games ______ every four years.
A.happened to B.takes place C.takes away D.takes out
As doctors, they try their best to help ______.
A.the ill B.the sick C.sicker D.sick
Please don't leave until your parent ______ you.
A.will met B.met C.meets D.meet
—Will he ______ come to the party?
—I'm not sure.
A.must B.could C.may D.be able to
