给下列句子排序,使他们组成一片短文.
（）1.They bought a big toy car at last.
（）2.So they went to the supermarket together yesterday.
（）3.Dingding and Dongdong are good friends.
（）4.Then they went home by bus.
（）5.They saw lost of toys there.
（）6.They went there very early.
（）7.They wanted to buy some toys.
麻烦帮我解释出来.在写上答案..
只有这么多分了