how to add 'ing'for wander?why not dowhy not add double 'r'?

how to add 'ing'for wander?why not dowhy not add double 'r'? How much does that__________?A.add B.add up C.add to D.add up to Meantime wondering how much they need to add for the less fabric 什么意思 so knowing how to ask for information politely is important knowing为什么用ing形式 so knowing how to ask for information politely is impaotant know为什么用ing形式 add to ,add into,add...to...区别 区别add to与add up to aim at与aim for add to add to add...to... who knows how to add a question to ASK ASK is american website,you can add questions to ASK. 11.Please have all the figures _______ to see how much they ________.A.add; add up B.added to; C.add up; add up to D.added up; add up to how to die for how to look for add,add up,add to,add up to的区别 INSTAQUOTE ADD TEXT TO PHOTOS AND PICTURES FOR INSTAGRAM怎么样 You can _____ some sugar ______the tea.You can _____ some sugar ______the tea.A.add；into B.add；/ C.add；for D.add up to；/ 关于there be 句型后非谓语动词的用法.There have been several new events ___ to the program for the 2008 Beijing Olympic Games.A.add B.to add C.adding D.added答案是D我知道,我想问的是,不是说there be 后面+V.ing么?就象 Ther