i don't know the size for my trousers.may i___?a.try it on b.try them on c.thy on them

I don't know the......the question why?but i don't know the I don't know the place.是什么意思? I don't know. I don’t know the rule.还是I don’t know the rules. I don't(know)the teacher,but I(know about)her.可以换成know about;know? I don't(know)the teacher,but I(know about)her.可以换成know about ; know? “i don't know you know i don't know i know the times i don't have one myself I‘m s（）,I don't know the same I'm sorry,but I don't know the answer. I don't know the way () the post office . I'll ask the policeman____I don't know the way I don't know the w[ ] to the library. I don't know the to the lake中文是什么意思 是I don't know where is the washroom 还是I don't know where the washroom is是I don't know who is the winner 还是I I don't know who the winner is. The guy who i love you don't know me 英语翻译I don't know the translation Is that right?