1. (2020八上·柯桥期中) 阅读下面一篇短文，从题中所给的A、B、C、D四个选项中，选择最佳选项

    If you look at the top of your phone, you will usually see a little symbol that says 3G or 4G. The "G" stands for the "generation"（代）of your mobile network（网络）. But these symbols will mean（意味着） that things of the past after 5G network fully arrives.

    The 5G mobile network is 100 times faster and has 1,000 times more capacity（容量）compared with the 4G mobile network.

    In recent years, China pays great attention to the commercial（商业）use of 5G and tries to build the infrastructure（基础设施）for a 5G network. On March 30^th, 2019, Shanghai vice-mayor（副市长）Wu Qing made the first 5G video call on a Huawei Mate 10 smartphone, CGTN reported. Shanghai is also the first city in China to start testing 5G network.

5G will let people download and upload data（数据）faster than ever before. But 5G will not just bring faster mobile Internet. People can use it for many other things, too. For example, 5G will help to make self-driving cars safer. Today's self-driving test cars has one problem—the lag（滞后）.When the car "sees" an obstacle, it sends this information to a data center and gets instructions（指示）.

    However, it takes time to send and get this information. With this kind of lag, the cars might crash（撞击）because they don't get instructions in time. With 5G, this lag will be greatly reduced（减少）and make the cars safer.

    5G could also be used to make the Internet of Things (IOT) stronger. This refers to a large online network that connects（联系）all things and people. Fast Internet speeds（速度）will be the key to developing this technology（技术）. For example, with the Internet of Things(IOT), your fridge could order eggs online when it finds there are no eggs left inside. How amazing!

1. （1） In which city was 5G tested for the first time in China?

   A . Beijing B . Shanghai C . Shenzhen D . Guangzhou
3. （2） We can learn from the story that __________.

   A . China will pay little attention to the use of 5G. B . there will be no difference between phones. C . we can now buy self-driving cars cheaply. D . the 5G mobile network is much faster than the 4G network.
5. （3） The writer uses self-driving as an example to ________.

   A . make us understand how self-driving cars work B . show us how fast self-driving cars are C . tell us the possible dangers of self-driving cars D . tell us how 5G's fast speed （速度）can be helpful
7. （4） The underlined word "obstacle" in Para.4 means _______ in Chinese?

   A . 障碍物 B . 困难 C . 目标 D . 警告
9. （5） According to the story, the IOT is _________.

   A . a robot that can do housework B . a large online store where you can buy anything you want C . a large online network that connects everything and everyone D . a kind of fridge which has IOT technology