most chirden can't c__ on one thing a long time

Most children can't c____ on one thing for a long time. He can only take one thing at a time.How can he go across th I can't c__ on my studies with that noise going on. 英语翻译For one thing ,a post can be taken off of a page while t 英语翻译A.can't buy fruit on water B.can always find cheap thing Can't find a can let me love for a long time I have been alw too bad one thing money can't buy is a real friend 如何译? one time thing one can never have the s____kind of weather for a long time that book is a c__ one.we can see it here and there you can't have a good time if your haven't enough time on yo I can can a can,for a long time.