题目内容：

Hover Camera (无人相机)

Wang Mengqiu, the inventor of Hover Camera, was born in Hangzhou in 1982. He once studied at Stanford University in the United States. He became famous because of the invention.

Forget selfie sticks (自拍杆)!  Compared to other cameras, Hover Camera has many advantages.

* It can fly and stay in mid-air, track your face and even follow you to make sure it gets the perfect picture.

* It can be controlled by using a smart phone(智能手机).

* It records movements with a 13MP camera and takes 4K video.

* It is the best choice for weddings, sports games and holidays.

Mr. Wang also said, “The main design consideration is easy and safe to take for the users. It’s very light and small. It can be folded in two, so it can be easily put into a bag. When the power is low, it can land on the ground safely on its own.” It’s said that the company has raised $25 million to produce it. As it is still being tested, Hover Camera can be bought later this year. The price has not yet been decided. But a spokesman says the company hopes to sell it for less than $600.

1.Hover Camera can _________.

A. swim in the river    B. fly in the mid-air

C. change its weight    D. be used as a phone

2.The underlined word “track” means ________.

A. Pull    B. follow    C. push    D. show

3.According to the passage, why is Hover Camera easy and safe to take?

A. It’s light and small.    B. It can be folded in three.

C. It doesn’t need power.    D. Only a smart phone can make it land.

4.Which is not mentioned in the passage?

A. How can we control Hover Camera?    B. When can we buy Hover Camera?

C. How much is Hover Camera?    D. How popular will Hover Camera be?