I don't know _____ ____ this book is.【我不知道这本书多少钱】His brother ___ school things ___ that store.【他弟弟从那个商店里买学习用品】

I don't know how I can get there. 改为简单句I don't know _ _ _ there. I don't know where I can post this letter .=I don't know _ _ _this letter . I _ don't know what it is I don't know a _ o_ _of French. I don't know what we will do next.(改为同义句)I don't know _____ _____ _____ next. I don't know whom I should ask(改为同义句）I don't know whom _____ _____. 改为同义句：I don’t know what I should buy her.I don't know _____ _____ buy her. 有这么多纪念品,我不知道该选择哪一个There're _ _ souvenirs,and I don't know _ _ _ _.=I don't know _ _ _ _ _ (复合句) i don't know _ _ _(多少次) HE HAS TRIED. 英语翻译I don't know _____ ______ _____next. I don't know what _____（eat） for lunch I don't know which sweater _____(choose) I don,t know which one _____ （choose) I don't know which watch _____(choose). I don't know why he _____(like) elephants. I don't know. 【合并英语句子】.I don't know.HOW old are you?合成I don'tknow_ _ _ _. 合并英语句子.I don't know.HOW old are you?合成I don'tknow_ _ _ _..