We consider ______ some signs to stop people from smoking here.
A.to set up B.to put up
C.putting up D.setting up
Personal computers ______ in 1976. It has changed the whole world.
A.have invented B.were invented
C.is invented D.invented
—Terra, you shouldn’t be so ______. You always leave your things everywhere.
—Sorry, mom. I’ll put them away soon.
A.terrified B.cheerful
C.frightened D.careless
By the time I got home, Gina and her sister ______ their project already.
A.finished B.have finished
C.had finished D.will finish
—I think you can ______ money by yourself to buy a present for your mother.
—OK. I’ll try. I’ll not let a penny waste.
A.spend B.save C.cost D.leave
—I think the man over there must be Bob.
—It ______ be him. He has gone to Paris.
A.can’t B.can C.may not D.mustn’t