i do not know which one to choose.i do not know what to choo

i do not know which one to choose.i do not know what to choo I do not know which one to choose.为什么是用不定式呢? I do not know which coat to choose （改同义句） I do not know ———— I do not know which one to choose.帮我分析一下这个句子的一些成分. 填空!I do not know which Chinese restaurant()(choose). I want to buy a pair of shose ,but i do not know A which one I do not know how to do I really don not know ________.A.what to choose B.which to b This moment,I do not know what would like to I do not know what you mean to say is, I am do not know what to say(同一句) i do not know what to do next 改成复合句i do not know what ___ __