D. What users should pay attention to.

答案　A

解析　段落大意题。通过第二段可知，本段讲述了Sneakairs是怎样通过内置GPS及手机蓝牙实现导航的，以及怎样通过震动提醒用户的，由此可知第二段是介绍Sneakairs怎样工作的。故选A。

3. What might easyJet do to improve its smart shoes?

A. Bring down their cost.

B. Add more functions.

C. Develop more types.

D. Make the battery last longer.

答案　D

解析　推理判断题。根据最后一段最后一句可知，这款智能运动鞋的缺点就是电池使用时间短，所以easyJet为了改善它的智能鞋就要确保电池续航时间更长。故选D。

4. Where does this text probably come from?

A. A commercial ad. B. A science report.

C. A tourist map. D. An airline guide.

答案　A

解析　文章出处题。全文都在介绍一款名为Sneakairs的智能鞋，可推断这篇文章最有可能来自一则商业广告。故选A。

(2018•陕西安康高二期中)

We were on our way home from Houston one Saturday morning. We decided to stop at a local gas station to get coffee and something to snack on since it was a good hour and a half before we got home.

When we were done，we got back into our car and before I started it，we noticed a man standing outside in front of the building. He was a homeless man with worn clothes and it looked like he had gone in and gotten himself some coffee or something warm to drink since it was cold this time of the year. He must have not had enough money to get something to eat.

Then a dog walked up to the front of the building. I could tell she was a "she"，because you could tell that she had been feeding baby dogs. She was terribly in need of something to eat and I felt so bad for her. I knew if she didn't eat soon，she and her baby dogs would not make it.

I and my wife sat there and looked at her. We noticed that people walked by and didn't even pet her，like most people do when they walk by an animal in front of a store. We still did not do anything. But the homeless man，who I thought did not buy himself anything to eat，went back into the store. And what he did brought tears to me and my wife. He had gone into the store and with what money he may have had，bought a can of dog food and fed that dog.

This story plays a great part in our lives. You see，that was Mother's Day weekend. And a lot of people forget that some animals are parents too.

It took a homeless man to show me what I should have done. He made me a better man that day.