I don't know _____A.where can I find my English books B.where I can find my English book选哪个?答案上是B,为什么?

I don't know how I can fly a kite.I dont know how _____ _____a kite. I don't know how I can fly a kite(同义句） I don't know how ____ _____a kite I don't know. “i don't know you know i don't know I don't know _____A.where can I find my English books B.where I can find my English book选哪个?答案上是B,为什么? sorry,I don't know. i don`t know much I don't really know. 英语；I don't know I don't know miss I don't know him. I don't know now 翻译 i don't know So know,I don't I don't know her i don't know anything I don't like milk I don't like,_____A too B neither C either ( )I really don't know _____A.what should I do B.what to do C.what do I( )I really don't know _____A.what should I do B.what to do C.what do I我在百度搜到答案是B的原因是不定式作宾语 一种是及物动词后直接跟带to的不定