With the development of technology，WiFi is becoming more and more popular and important in people's daily life.But have you ever experienced it？Just imagine what life will be like if there is no Internet.Maybe you won't be able to talk with friends，play video games or search for information for your homework on the Internet.
   But in fact，only one third of the world's population are able to get information on the Internet.The rest（其余的）are too poor to buy WiFi access（使用權(quán)）or they live in remote areas（偏遠(yuǎn)地區(qū)）.As a result，they live without the Internet.
   Google and Facebook，two world-famous technology companies，have decided to do something about it.Google's Project Loon will try to send balloons（氣球） which are 15 meters wide into our Earth's stratosphere（平流層）in 2016.The balloons are made of a special material（材料）that is three times thicker than the plastic bag we use every day.Each balloon will carry a minicomputer（小型計(jì)算機(jī)）and a WiFi radio.The WiFi radio will send the Internet over the areas it is floating over.Then people can get up-to-date（最新的）information on weather or news.

（1）Two thirds of the world's population live without the Internet because

D

D

.
A．they have no money to buy WiFi access
B．they live in remote areas
C．they don't need the Internet
D．they can't afford WiFi access or they live in remote areas
（2）The underlined word "which" in paragraph 3 refers to（指代）

C

C

.
A．companies
B．Google and Facebook
C．balloons
D．Google's projects
（3）Which of the following is TRUE according to the passage？

B

B

A．The balloons are 15 meters long.
B．People can do lots of things on the Internet.
C．The WiFi radio can send the Internet without any help.
D．The material of the balloons is as thick as our usual plastic bag.
（4）The main idea of the last paragraph is

A

A

.
A．how to send the Internet
B．how to use the Internet
C．what the balloons look like
D．how soon people will get WiFi from the sky