They have decided which hotel to stay at.这里为什么要加at,那什么不时候不加at

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 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 decided to have a good talk .THey have ________ a time to meet. [-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 have decided ____ they will leave for New York.答案是when,可不可以填that? 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. have not decided!中文, so they decided to have a picnic by the _____(填什么) They have decided where to go for their hoilday同义句 it was late ,so they decided to go and have (d__)in a restaurant首字母填空 They decided to have a field trip to spend their holidays怎么译 they have decided to use the post office to send letters 同义句 it was nearly six o' clock,then they decided to go and have dinner tigether.意思 They decided to have their daughter ____________ (educate) 请分子句子成分,还有为什么用educated 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