These young people gather now and then, but not _____ [ ]

Li Ming works______ and he _______ plays computer games.

Did you enjoy yourself at the party? –Yes, I’ve never been to ______one before.

I sent the letter early that morning _______ she got it that afternoon

把下面的语句组成语意连贯的一段话，顺序排列最恰当的一项是( )瘦肉精是一类动物用药， 。①将瘦肉精添加于饲料中②可以增加动物的瘦肉量、减少饲料使用、使肉品提早上市、降低成本③有数种药物被称为瘦肉精④例如莱克多巴胺及克伦特罗等⑤各国开放使用的标准不一⑥但因为考虑对人体会产生副作用