You ______have written such a long article. The teacher said 100 words would be enough.A. mustn’t B needn’t C couldn’t D. wouldn’t
---I hear Johnson was badly injured in the accident. ---_____, let's go and see him.
Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
Don't panic; just ______ the rock and I'll come and fetch you down.
With a lot of difficult problems ____, the newly -elected president is having a hard time.
---May I have a word with you? ---______. I'm not busy, anyway.