i don't know _ good they could have done.A.howB.that C.what D.which

I don't know how I can get there. 改为简单句I don't know _ _ _ there. i don't know _ good they could have done.A.howB.that C.what D.which 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 think he is a good student,_ because I don't know this area good 翻译 I couldn't catch your heart,I don't know your heart?I don't know that I don't know what good,I l翻译下,急. 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. 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_ _ _ _.. I don't know how I can get to the museum.（改为同义句)I don't know _ _ _ the museum I don't know how I can get to the museum.（改为同义句)I don't know _ _ _ the museum I don`t know how to have fun.(同义句） I don`t know how to have a good time.I don`t know how to()( I don't know what we will do this afternoon改为同义句I don't know _ _ _ this afternoon “i don't know you know i don't know