clean blackboard 和clean blackboard区别,为什么要加the,

clean blackboard 和clean blackboard区别,为什么要加the, clean the blackboard clean the blackboard的意思 Let me clean the blackboard Clean,the,blackboard,please怎么读 如何回答let me clean the blackboard clean the blackboard 怎么背单词快 Please clean the blackboard的否定句 Let him______(clean)the blackboard today Please r_____ to clean the blackboard. Let him ___(clean)the blackboard today to,the,told,blackboard,me,she,clean lucy,you clean the blackboard today, You can clean the blackboard after class 改为祈使句 Let's clean the blackboard.同义句是什么? 连词成句me,the,clean,let,blackboard. let me _____(clean) the blackboard for you,sir. Please don't get the blackboard ______.(clean)