题目内容：

We’ve all experienced that feeling that comes when your phone makes a sound to tell you that its battery level is low. It often comes at the worst times – when you’re out on a trip and don’t have a charger, or when you’re expecting an important phone call.

Indeed, this feeling is so common that South Korean electronics manufacturer LG has given it a name: low battery anxiety.

According to a survey of 2,000 US adults conducted by the company last year, 90 percent of respondents said that they panic if their battery level reaches 20 percent or lower.

And last month, UK telecommunications service provider 02 found that around 15.5 million Britons live in “constant fear” of their mobile phones running out of power, according to a survey by the company.

“The problem is not about being unable to make calls, but is rooted in the fact that smartphones are now where we store digital memories,” noted the Daily Mail.

However, battery worries don’t just affect smartphone lovers. Many owners of electric vehicles also suffer from so-called “range anxiety”. This refers to the concern that the vehicle may not make it to its destination before the power runs out.

Meanwhile, it isn’t just low power that people worry about. A study carried out by South Korea’s Sungkyunkwan University and China’s City University of Hong Kong found that many of us also worry about not having constant access to our phone.

This condition is known as nomophobia, short for “no mobile phone phobia（恐惧症）”. Symptoms include feeling uncomfortable when access to one’s phone isn’t possible, being unable to turn off your phone, and constantly topping up the battery to make sure it never dies.

So, why do so many people treat their smartphone with such importance? The underlying reason may be that they keep us connected to the people around us, and if we’re unable to use our phone, we feel like we’re cut off from our social life.

With products with bigger batteries being released all the time though - such as Xiaomi’s Mi Max smartphone range or Tesla’s Model S cars – battery anxiety may hopefully soon be a thing of the past.

1.The major reason for people’s “low battery anxiety” lies in ________.

A. They cannot afford to miss important calls.

B. They may lose contact with their friends when they’re out on a trip.

C. The charger is not available when needed.

D. They have no access to the digital memories stored in the phone.

2.The following conditions indicate that you are likely to experience “nomophobia” EXCEPT that ________.

A. you attach great importance to connecting with the outside world

B. you find yourself searching for your phone when it is not at hand

C. you constantly charge your phone to almost full

D. you always keep your phone on

3.What can we learn from the passage?

A. All of the respondents do not panic when their battery level is lower than 20%.

B. People who experience “range anxiety” worry about the quality of their car.

C. People value their phone because they want to participate in more social activities.

D. All these problems will be solved if products with bigger batteries are released.

4.What’s the writer’s attitude towards the solution to low battery anxiety?

A. Unconcerned.    B. Skeptical.

C. Positive.    D. Disapproving.