I don't know ——— I should bring a present.A.whom B.if C.what

I don't know what he said的同意句是什么?I don't know what he said同义句I don't know — — what`s love?I don`t know! I don't know. — What’s your major?1 I’m majoring in English 2 I’m English 3 I’m class three 4 I don’t know I‘m s（）,I don't know the same “i don't know you know i don't know —What is the name for kate's dog?—I don't know 错在哪里? I don't know when I will start.改同义句：I don't know when ——— —————. I don't know what i can wear today .( 同义句 ) I don't know—— —— —— today. I don't know how I can use the word 改为同义句 I don't know —— —— —— the word. I don’t know how I can learn English well同义句I don’t know—— ——learn English well I don't know how to use a dictionary.同义句I don’t know — I — — a dictionary.如题.注意看题! i don't think i know同义句i think i—— —— —— 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