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Theyarebusy_thisweek.They_verytired.Whynot_arest?A.work,maybe,tohaveB.towork,canbe,haveC.working,nus
题目内容：
They are busy _ this week.They _ very tired.Why not _ a rest?
A.work,may be,to have B.to work,can be,have C.working,nust be,have
D.with work,will be,having优质解答
C.working,must be,have
be busy doing sth忙于做某事
must be表肯定推测
why not do sth为什么不?
A.work,may be,to have B.to work,can be,have C.working,nust be,have
D.with work,will be,having
优质解答
be busy doing sth忙于做某事
must be表肯定推测
why not do sth为什么不?
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