nothing added to our understanding of the math problem

nothing __ our understanding of the math problem 应填added/added to/added up to/added up? nothing added to our understanding of the math problem Added to our his report has greatly------our knowledge of the subject.A.added B.added to C.added upD.added up to 高一英语28He said that the Giant Apple （ ） the beauty of our school.A added B added to C added up D added up to his report has greatly------our knowledge of the subject.A.added B.added to C.added up D.added up to it is nothing but time A.to add B.to be added c.adding D.added请说明理由 it is nothing added but what's matter?nothing,it is you added me,so i say hi to 44.The teaching building of our school_____ for many times.[04上海卷29]A.has been added to B.has added toC.has been added up to D.has added up to为什么 The snowstorm added to our difficulties.为什么要加to,add是及物动词呀 this of course ------ our difficulities Aadded up to Badded up C added to Dincreased We palanted many flowers and green trees in our school,which（ )the beauty of the whole school.A added toB added upC added up toD were added to说说为什么不能选D what he did has added to our difficulties为什么用现在完成时 what you had done added to our difficulties.帮忙分析这个句子为什么add后要加ed He did not come and it added up to our difficulty.改错 the number of the stedents in our school---1000a have added up to b adds up to c has been added up to d is added up to选哪个 请说明理由 what he had said about the accident and done with it（ ）our trouble..added to 为什么不是D were added to.