work on my 如题,

work on my 如题, 请问“work on it had begun before my sister laft.”一句中的work on it怎么讲,如题. on my 如题. 英语题：I go to work on my bike =? 是at my work还是 on my work? she went to work on foot(同义句).如题 I have a ( ) finished my work如题,填空. work on my English project什么意思 My grandparents work on a farm.中文 I go to work on my I'm on my 如题 I swear it on my 如题. Work hard at my study还是on my study? 如过对方说:I can not concentrate on my work these days.我该说什么啊(用英语) My mother goes to work on Monday 改为否定句题在上面了速度ing I work on my business的on my business是什么意思?为什么用on? 改错,My dad goes to work on foot,his father goes to work on bicycle. I keep my mind on work.on work 做什么句子成分?