Please check your homework before handing it in!中hand为什么用ing

Please check your homework before handing it in!中hand为什么用ing -------------------（检查）your homework before handing it in .( 翻译句子：You must check up your homework before you hand it in. before handing in your compositions,please correct the mista When you _____ your work,please check it before you hand it please c ____ your paper before you hand it in 英语连词填空please check your homework carefully_you hand it inple 英语Please check the copy＿the original before handing in． Before your hand in the homework,you should c( )it carefully Lin Kai,hand in your homework,please.Oh,sorry.I ____ it at h Please to hand in your homework,please 和hand in 都是动词,中间要不要用t You should c________your homework before you hand in it