To who take part in exam of tomorrow肯定有语法错误,to who应该也不会出现,出现也是to whom(who的宾格）只能在定语从句里用.tomorrow是adv.前面不用加of.其实可以用一句话表达你的意思.Trust yourself and I believe You can go through the exam tomorrow .如果你不是考试题的话,有没有语法错误没关系的.