I__________it\'s important to sleep eight hours a night怎么填

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I__________it\''simportanttosleepeighthoursanight怎么填I__________it\''simportanttosleepeighthoursanight怎

I__________it\'s important to sleep eight hours a night怎么填
I__________it\'s important to sleep eight hours a night怎么填

I__________it\'s important to sleep eight hours a night怎么填
可填think、know、.要看上文