Please don’t drop litter _______,you should throw it into the dustbin _______.A.careless; careful B.carelessly; careful C.carelessly; carefully D.careless; carefully

Don't drop them. Please get all the ______ back after the relay race.Don't drop any. Don't drop litter anywhere.为什么用drop不用dropping呢?Put out your cigarette,please.为什么要用put不用putting. Don't drop ____ on the floor.Please pick it up.A water B paper C books D bottles Donˊt drop the vase. Don't _______(care) drop litter 将下列肯定句改成否定句Please listen to Mr Li.我写的是“Please don't listen to Mr Li.”,答案是“Don't listen to Mr Li.” please don't park Please you don't please don't thouch Please Don't please don't go please don't flit Please don't please don't let please don't say Please Don't Please pass on the m___ to Li Lei.2、Don't be n__ when you ansewer the teacher's question.