l decided not to a ______ with my brother any more because he is very stubborn

Mother decided _(not buy) a computer . _ a reply,he decided to write again.为什么是not having recieved,而不是not recieving? We have decided not to go,though it was a difficult _(decide) l decided not to a ______ with my brother any more because he is very stubborn When and where to build the new school （ ）A：is not decided B:are not decided C:has not decided D:have not decided Howand when to leave for Yunnan()yet　A are not decided Bhave not been decided Cis not being decideD has not been decided He told us that where _ a picnic was not decided yet.He told us that where ______ a picnic was not decided yet.A.having B.to have C.have D.had when and where to bulid the new factory___yet A.has not decided B is not decided decided not to want to l have not decided if l should go to Africa.(同意转换） Not until l began to work _ how much time l had wasted.A.have l realized B.l have realizedC.did l realize D.l realized when and where to build the new factory / yet.a:is not decided; b；has not decided; when and where to build the new school _______.（要解析）A.is not decided B.has not decided When and where to build the new power plant ___yet A has not decided C is not decided 11.When and where to build the new factory ____ yet.A.is not decided B.are not decided C.has not decided D.have not decided为什么选A,不选C? _ to hold a sports meeting _ yet.选择.​A.When;hasn't decided.B.Whether;isn't decided.C.If;isn't decided.D.Where;hasn't decided.说明理由. where and when 后面接is 还是are ?when and where to build the new factory ( ) yet. A.is not decided B.are not decided C.has not decided D.have not decided When and where to build the new school （）yet .A：is not decided B:are not decided C:has not decided D:have not decided 为什么用过去式 不现在完成时