单项选择题

案例分析题

One day a little boy comes into a shop and【C1】______the shop assistant，“I want【C2】______twelve exercise books of 6cents each and pencils of 10cents each.【C3】______is that altogether？”
The shop assistant writes these numbers down on【C4】______and thinks for【C5】______.Then she says，“1dollar and 62cents.”“If I gave【C6】______ten dollars，how much will I get【C7】______？”“You’ll get【C8】______for change.Here you are.Here are the things you want.”“【C9】______，I don’t want to buy anything.”“【C10】______boy looks at the piece of paper and says politely，“This is one of my homework.Thank you very much.Can I take it away？”
“What!”says the shop assistant angrily.

【C1】（）