题目内容：

    Being able to take advantage of truly unlimited data is a smartphone user's dream, but everyone I've talked to about 5G is more excited about the usage unlocked by next - generation wireless devices. From smart home security to self - driving cars, all the Internet - connected equipment in your life will be able to talk to each other at lightning - fast speed with reduced delay.

"5 G is one of those forerunners, along with artificial intelligence, of this coming data age, ” said Steve Koenig, senior director of market research for the Consumer Technology Association. "Self - driving vehicles are emblematic in this data age - they show application of data completely. With one single task, driving, you have large amounts of data coming from the vehicle itself, and a variety of sensors (传感器)are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about conditions down the road. There's lots of data behind that task, which is why we need the speed and lower latency ((延迟).

AR glasses and virtual (虚拟的)reality headphones haven't yet been inside the mainstream, but tech companies are joyfully saying that such equipment will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to improve - or even replace - smartphones.

Ericsson showed at February's Mobile World Congress in 2019 how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on outside equipment for processing power.

But don't get too excited. There's still a lot of work to be done in the meantime, including some necessary testing to make sure the radio plays nicely with basic systems and service construction so that 5G isn, t concentrated only in big cities.

1.What does the first paragraph focus on?

A.Potential of 5G. B.The super speed of 5G.

C.Usage of smart equipment. D.The future of smart equipment.

2.Which word can replace  "emblematic"  underlined in paragraph 2?

A.available B.productive C.representative D.popular

3.What is tech companies"  attitude towards the replacement of smartphones?

A.Uncertain. B.Optimistic. C.Cautious. D.Disapproving.

4.Why does much work still need to be done according to the last paragraph?

A.To make radio play nicely. B.To construct big 5G cities.

C.To do 5G trials effectively. D.To expand 5G coverage fully.