If you don't work hard,you'll fall behind.(改为同义句 —— ——,——you'll fall behind.
问题描述:
If you don't work hard,you'll fall behind.(改为同义句 —— ——,——you'll fall behind.
答
应该是:Work hard,or you'll fall behind.意思是:努力学习,否则你就会掉队的.