– Must I finish my homework now? – No, you_________. You may do it tomorrow. A. mustn’t B. can’t C. don’t have to
—It nearly took me two hours to walk here. —Have a drink then.You________be thirsty.
—Who helped Betty tidy up the bedroom just now? —________.She cleaned it all by herself.
Don’t________all the soap.Leave me some to wash hands with.
—Did you hear________in your room? —No,I didn’t.
Look!There are some people________after a thief.