Must I clean the blackboard now?No,you___clean it later A mu

Must I clean the blackboard now?No,you___clean it later A mu Must I clean the classroom now?No,you____.You can do it afte Must I clean the room now No you don't_______ must i clean the classroom right now?No,you ( ) Must I do my homework now No,you .you can do it later 填donno No,I can't clean the blackboard.问句是什么? Must I clean the floor now? Must we clean the classroom now?No,you needn't.It ______ aft Must I clean the room now (作否定回答） No,you _____ _______ _____ -must we clean the room right now? -no,you___.YOU____clean i Must they clean the classroom now?No,they ___.A.can't.B.need must i clean my room now ?---no, you ___ .but you must clean