5G is the 5th generation network. It means super-fast data speed, one can download a two-hour movie for fewer than 10 seconds, and it is making our lives more and more convenient.
　　5G will make self-driving cars possible. For safety, self-driving cars need super-fast data transmission to communicate with their nearby environment. 5G is just what makes self-driving cars achieve this.
　　5G will be a big help for students who take online classes. Many people live in poor areas in the world where there are no schools. But with 5G, this will change. Students all over the world will be able to see places like the Great Wall without leaving their rooms.
　　It will be also easier for doctors to treat patients remotely by 5G. It means caring for patients from far away.
　　The facts listed above are only a part of what 5G will make possible and popular. Just as in the early days of the Internet in the 1990s, few could see how it could change the world. The same will surely be true of 5G. With 5G, many things do not seem like dreams any more. Now let's get ready to say goodbye to 4G and welcome the coming of 5G.
（1） According to the passage, with 5G, you can download a four-hour movie within ______.
A. 50 seconds
B. 40 seconds
C. 18 seconds
D. 21 seconds
（2） Self-driving cars need super-fast data transmission to communicate with their nearby environment for ______.
A. convenience
B. popularity
C.system
D. safety
（3） With the help of 5G, it's ______ for students can see the Great Wall without leaving their rooms.
A.possible
B. impossible
C. unrealistic
D. necessary
（4） How do you understand the last sentence "Now let's get ready to say goodbye to 4G and welcome the coming of 5G"?
A. The writer is worried about the coming of 5G.
B. With 5G, some of our dreams will come true of sure one day.
C. 4G is no more used in our daily life now.
D. 5G can make everything possible.
（5） Thanks to 5G, which of the following can you see in the future?
A. Car drivers without driving licenses.
B. Schools without teachers.
C. More and more online classes.
D. Hospitals without doctors.