Have decided（ ） on winter vacation?这个句子括号中为什么不能用what to do?

是Have you decided ( ）on winter vacation?空格里为什么不能填what to do Have decided（ ） on winter vacation?这个句子括号中为什么不能用what to do? 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. Tim was seen______（get）out of the subway station on centre street.When and where to build the new factory_____yet.A.were not decided B,are not decided C.has not been decided D.have not been decided Have you decided the time______ you will spend on holidays. They decided __(have) a meeting on Sunday. have　you　decided　what　to　do　on　the　　weekends?（写同义句填空格处：have　you（）（）（）on　what　to　do　on　the　weekends? I have no classes on w （急!） when and where to go for the on-slary holiday___yeta:are not decided b:have not been decided c:is not being decided d:has not been decided We have no classes on w. have not decided!中文, He decided on the work 同义句 He decided （ ）（ ） the work When and where to build the new school （ ）A：is not decided B:are not decided C:has not decided D:have not decided decided in 和decided on有什么不同decided to he decided to have a big C_____ party on the ice. Have you decided the time______ you will spend on holidays为什么用that 不用when Busmen have decided to go on strike next week. 是什么时态? Have you decided on where you'll spend your hoilday?这是个什么句子