1.I'm not sure how old are you?2.I'm not sure how old you are?which one is right?tks

1.I'm not sure how old are you?2.I'm not sure how old you are?which one is right?tks I'm not sure I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) I'm sure I am not wrong 有没有I’m not too sure? NOW, I'm not sure 什么意思 为什么没有I’m not too sure? I'm not sure ______ it's a good idea or not.A.whether B.that C.how D.if I'm not sure when I should go.同义句 I'm not sure when( )( ). I'm not sure yet还是I'm not sure either?如题,寻求原因 How many students does your school have?_____,but I'm not sure.填hundreds of one hundred? I'm not sure what's playing, I hedged. 英语翻译翻译:----Yesterday Mary broke two glasses when she was washing them.-----I'm not sure.How could she be so careless?关健是I'm not sure.我不确定,在这里怎么翻译.好像不通顺. would you like to join the school volunteer project?yes,but i'm not sure------A What i should doB How i should do I'm not sure what I should expect（改为简单句） I'm not sure ___ ___ expect I'm not sure where I should go.的同义句 I'm not sure where （ ）（ ）.