假如你是李华,下面是你的英国朋友萨姆（Sam）写给你的邮件.请你给他回邮件,就他的问题提供一些建议 Dear Li Hua,I’m really enjoy my taekwondo（跆拳道）classes which I have two evenings a week.Unfortunately I have a lot of homework and exams to prepare for at the moment.I need much time to study but at the same time I don’t want to stop going to taekwondo classes.What do you think I should do?