to get better grades,grade为什么要加s

to get better grades,grade为什么要加s You should try harder to get better . A. work; grade B. to work; grades C. to work; gradeD. works; grades .I am going to get better grades.I'm good at English and Chinese,.I am going to get better grades.I They are going to work (hard) because they want to get better grades The best way to get good grades is to work hard,I can do better I will work hard to get （）grades good 还是 better If you want to get good grades,you'd better write the article _____(不同） I'll work hard to get （ ）grades.good 还是 betterI'll work hard to get （ ）grades.good 还是 better,理由 1.healthy,my,grades,good,get,helps,me,lifestyle.2.good,better,study,food,and.to,exercise,help.me连词成句 he wants to get good grades in math.为什么grades要加s you should work ________ than before to get good grades I wish my son to get good grades this competition! i’m going to get good grades.改为一般疑问句 good,good,help,health,grades,can,us,get,to联句 it is hard to get good grades的意思是什么 Everyone wants to get good grades,____ ____? im going to get good grades（改为一般疑问句.） I hope him to get good grades.改错