When I came to the United States, I didn' t speak any English. When anyone asked me something , I always said " Yes." But I really didn' t know what they were saying. Once I went to a large store to buy a mouse (鼠标) for my computer. When I got there, I was worried about the price. At last I found a cheap mouse. I checked the price to make sure of it before I went to the cashier. While I was at the cashier' s, she asked me something. I said, " Yes," even though I didn't understand what she said. Then she told me what I had to pay. The price was different. I knew something was wrong. But I was afraid to say anything. Later, at home, I thought about what the cashier said to me. What made the price go up? Then my husband came home. He looked at the receipt and found out what was wrong. The cashier's question was, "Would you like a one-year warranty(保修)?" and my answer was, "Yes." Since that day, I have never said "Yes" before I understand the question. And I have never paid more than the actual(实际的) price.
单选题
The writer is studying in the United States.
【正确答案】
C
【答案解析】解析：句意：作者在美国学习。是非题。从文章第一段第一句“When I came to the United States，I didn’t speak any English．”可以推断出作者在美国，但是具体做什么并没有说，故选C。
单选题
Before going to the cashier, the writer knew nothing about the price of the mouse.
【正确答案】
B
【答案解析】解析：句意：在付款前，作者完全不知道鼠标的价格。是非题。从文章第一段“I checked the price to make sure of it before I went to the cashier．”可知，本题与原文不符。故选B。
单选题
The writer understood the cashier's question before she gave an answer.
【正确答案】
B
【答案解析】解析：句意：作者在回答收银员问题前，明白收银员的意思。是非题。从文中第一段倒数第四句“even though I didn’t understand what she said”可知，本题表述不符合原文，故选B。
单选题
The writer paid more than the price of the mouse because of the warranty.
【正确答案】
A
【答案解析】解析：句意：作者因为保修期多付了鼠标钱。推断题。文中第二段最后一句“The cashier’s question was，‘would you like a one-year?’and my answer was，‘Yes!”’可知，因为保修卡多付了鼠标钱，所以是正确的。故选A。
单选题
The writer learned an important iesson from her own story.