Complete the following passage with the words in the box. Each word can only be used once.

A. camera       B. worry       C. screen       D. problem       E. turning on       F. waiting for       G. at the same time

Have you ever walked on the road while playing with your mobile phone? Be careful! It might cause accidents, like hitting a tree. Now, thanks to the development of science and technology, we have a new invention to solve this 【小题1】. It is called a transparent (透明的) screen.

The Android app called Transparent Screen Pro uses the 【小题2】 on your mobile phone. When you are using your phone, this app captures an instant image (捕捉实时图像) and uses it as the background of your screen. In this way it makes your phone look transparent. You can see the road and the street view 【小题3】 as you are texting or reading novels on your phone. You can also make your screen look semi-transparent by changing the settings of the app.

However, this useful app also has its side effect. Many users 【小题4】 that it may be used to peep at (偷窥) others without being noticed. “Imagine you are 【小题5】 the bus at a bus stop,” said a female user, “and the man staring at his phone could be secretly peeping at you!”

As the app becomes more and more popular, it also draws some criticism (批评). Nowadays mobile phones have already taken up too much of our time. Maybe we should move our eyes away from the 【小题6】 sometimes, and take a good look at the real world.