根据材料内容，从方框中选择合适的句子填入文中空缺处，使材料完整、通顺。    Tom is only six years old．He loves animals very much．Many students in his class have pets (宠物)，but he doesn't have one．____It's Sunday．Tom and his mother go shopping．
    Tom asks, "Mom, could you buy me a pet?"
    "____" his mother asks．
    "I want a monkey．It's so clever．I like it very much．"
    "____It will eat your bananas．"
    "How about a panda? It is cute．It is my favorite animal．"
    "A panda? No．____"
    "Well, mm …" Tom thinks for a while (一会儿)．"Oh，I can have an elephant(大象)．It is very kind．"
    "It is so big and we don't have a big room for it," says his mother．"You can have a pet．____"
    Well, I know．
    "What is it?"
    "Dad!" Tom says happily．

A．You can't have a monkey． B．So he wants his mother to buy him a pet． C．But it can't be big, and it can't drink your milk or eat your bananas． D．What pet do you want? E．It will drink your milk．