At school,we have to (clean the blackboard).对划线部分提问

At school,we have to (clean the blackboard).对划线部分提问
_____ ______ you have to _____ at school.
英语人气:298 ℃时间:2019-11-09 15:39:23
优质解答
(What do) you have to (do) at school?
解释:因为这里要提问的是clean the blackboard,所以要用what来提问.
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