"They have decided to fly business class"

they haven't decided where they would have a party(改为简单句)they haven't decided ( )( )have a party [-They have decided not to go,haven't they?-Yes,they have decided not to.这句话错了吗?是不是把yes改为no They haven't decided on the place to have the important meeting.(改为同义句）They haven't decided _______ have the important meeting. They have decided to fly business class they have decided that they (won,t take)up the job.为什么主句是过去,从句不用过去 they will go to hainan this winter,but they ___ when to leavea.didn't decideb.have never decidedc.have dicidedd.haven't decided They decided that they wouldn't have the picnic because of the weather.(该为简单句）They decided＿＿＿ ＿＿＿＿ have the picnic because of the weather The haven't decided where to have the important meeting同义改写They haven't decided__________ the ___________to have the important meeting They decided __(have) a meeting on Sunday. They decided to have a r____ holiday 填空 They have decided where to go for their hoilday怎样同义句转换转换成They have decided _______________________________. They haven't decided where to go.是什么从句? They haven't decided on the place for skiing.=They haven't decided _ _go skiing. they haven't decided where to go next?为什么不是they haven't decided where go to next? They haven't decided on the place for skiing 改同义句They haven't decided ______ ________go skiing They decided to have a good talk .THey have ________ a time to meet. They have decided ______.A.when did they go B.C.where they would go D.when would they go 但B……我在另外的一本练习里,也有一道类似的：They haven't decided when they will go .就一个肯定,一个否定,为什么一个用would,一 they have decided to go to dalian for their holidays,but we haven't decided----A.when to go B.what to do C.how to go D.where to go 选哪个,为什么?