1.Tom and Jack's ( 填 ) （room） ( 填 )(be)clean.

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1.Tom and Jack's ( 填 ) （room） ( 填 )(be)clean.
2.Tom 'sand Jack's( 填 ) （room） ( 填 )(be)clean.

Tom's and Jack's rooms are clean.
再问：第1个呢？
再答：不好意思上面没看到 Tom and Jack's room is clean. 一个‘s表示两人共用的，两个表示各自的，所以一个是单数，一个是复数

1.Tom and Jack's ( 填 ) （room） ( 填 )(be)clean. let us （）clean the room with them to,为什么这样填,填go and Jack and I ( ) nine 填be动词 The girl ( 填be动词） Jack's sister. Please clean (填介词)the room,it's dirty. Let's _(clean) the room.怎么填 Tom and Mike ------here 填be动词 when__(be)Tom's and Jack's birthday 1.Tom's brother often_____( clean) his room on Sundays. This is Mr.Li's room.( )room is clean.( )里填什么? Tom and Lucy (be ) brother and sister怎么填? Tom and I ____at school now. 填be动词是什么?