-What did you do in today's history class?
-We talked about the characters____ achieved fame in American history.
A. who B.which C.／ D.what
-Why are you so late getting home?
-Our teacher didn’t let us go____ we had finished our homework.
A. because B.when C.if D.until
-Why are there so many people in the restaurant?
-It starts business today and the drinks____ for free.
A. were offered B.have offered
C.are offered D.will offer
I____some information on the Internet for my trip in the coming winter holiday.
A. gave up B.looked up C.showed up D.ended up
--Has Tommy finished his project yet?
--Maybe not. He ___on it at lunch time. Let's go to have a look now.
A. has worked B.is working
C.was working D.had worked
--Is that Anna's car?
--It____be hers. She has just gone to the theater for the new opera.
A. can't B.mustn't C.may D.could
