根据句子内容及首字母提示,在空白处填入一个适当的单词,使句子意思完整.A young boy,about eight y

根据句子内容及首字母提示,在空白处填入一个适当的单词,使句子意思完整.A young boy,about eight ye
根据句子内容及首字母提示,在空白处填入一个适当的单词,使句子意思完整.
A young boy,about eight years old,wanted to buy a big box of detergent （洗衣粉） in a shop.The shopkeeper walked over,and （71） a_______ the boy kindly if he had a lot of dirty clothes to wash.
"No,I don't have any dirty clothes," the boy said."I'm going to wash my dog."
But you shouldn't （72） u_______ this to wash your dog.If you wash your dog （73） b____ using this,he'll get sick.In fact,it might even kill them."
But the boy didn't listen and carried the detergent to the counter （柜台） and （74） p____ for it,even though the shopkeeper still （75） t______ to tell him not to use it to wash his dog.
About a week （76） l______ the boy came back to the shop to buy some candies.The shopkeeper asked the boy （77） h______ his dog was doing.
"Oh,he died," the boy said.
The shopkeeper said he was （78） s_______ that the dog died and added,"I tried to tell you not to use the detergent on your dog."
"Well," the boy replied,"I didn't think it was the detergent that （79） k______ him."
"Oh?（80） W_______ was it then?"
"I thought it was the spin dryer （甩干机）!"