第一部分 阅读理解(共两节，满分40分)
第一节 (共15小题；每小题2分，满分30分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A
Before leaving work, Steve Lee likes to use his cell phone to turn on his heat and air conditioner system at home.So by the time he gets through traffic into his front door, the temperature inside is perfect.You may wonder what a so-called smart home can do inside.
