他们的老师对家庭作业的要求很严格.
译文:Their teachers are very strict in their students‘ homework. (解释)对某事要求严格:be strict in sth
写同义句
Mr Li always encourages his studengts.
=His students always are encouraged by MrLi.(被动语态)
You won't be successful if you give up easily.
=You won't be successful unless you give up easily. unless除非,假设条件句