Alice didn't give up looking for his missing cat ______ the police sent it back.
A.until B.if C.after D.because
Martin ______ German for over five years. He works as a tour guide in Germany now.
A.studied B.was studying C.has studied D.had studied
You ______ worry about how to deal with the trouble. I will come to help you.
A.can't B.needn't C.may not D.mustn't
Mr. Jones looked ______ when he couldn't answer some simple questions from Ken.
A.silly B.sadly C.safely D.seriously
Make a change, ______ the football team will certainly lose again in the next game.
A.or B.and C.so D.but
If Emma improves her memory, she will be able to play chess as ______ as the computer.
A.good B.well C.better D.best
