- Must I clean the Lable now?

                    - No, you ____.  You may do it later.

A. can't        B. needn't      C. mustn't      D. shouldn't

 

---Must I clean the floor now?

---__________. It is too dirty.

A. Yes, you needn’t   B. No, you needn’t

C. No, you mustn’t   D. Yes, you must

 

--Must I clean the classroom now, Miss Wang?

--No, you needn’t . It                by Bill.

A. is cleaning     B. should be clean  

C. was cleaned     D. has been cleaned

 

—Must I clean the blackboard now?    —No, you _______ clean it later.

A．must

B．needn’t

C．can

D．shouldn’t

－Must I clean the windows now, Dad? －No, you ________. You may do it tomorrow.

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