“Do you have to leave now? ” “I’m sorry, but I really ____.”A. can’t B,have C.should D.must
He is ill. He has kept_____.
Having finished the work,_____.
The boy had his leg _____ while ____ football.
He would rather ______ his parents with their housework than _____ out to play games.
_____ carelessly, the boy made mistakes here and there. .