Every student should try their best （ ) lessons

Every student should try their best （ ) lessons Everyone should try their best to help their friends,( ) Every student should make their study （p ）. Try their best 还是Try their bests? Each person in the company should try his best to make their All of the students____(try) their best to study every day . l propose that every one of us should try our best Every student should do their own homework.有一处错误,能帮我找出吗? Try your best to their quarrel. the student work hard at their lessons.的意思 should try my best for you you should try your best to relax