题目内容：

A study found most people use their smart phones for an hour and 52 minutes a day. Most of this time is taken up with texting, emails and surfing the web, but only around 20 minutes is spent making three calls.

The survey of 2,000 people found that social media apps, calculators (计算器), calendars and cameras were

also seen as particularly important functions. Navigation apps (导航应用) such as Google Maps were popular too – with one in six people admitting they would feel unable to travel around an unfamiliar city without one. The study also found checking Facebook and taking pictures of others are carried out more frequently than making calls. Also on the list were the calendar to remember appointments and birthdays, mobile banking and the news are apps that make day-to-day life a little easier.

  Tom Barr said: ‘The functions on a mobile phone have developed and improved drastically (剧烈) over the past 10 years. With so many ways to keep in touch nowadays, people are using the functions that are convenient for them. As we get less and less time to ourselves, we need more convenience in our lives and less difficulty. While calling can be more personal, it doesn’t always save your time.’

  Scientists at Rice University wanted to see if the latest mobile technology would be used by the students to

improve their learning. But a year later, the researchers concluded that it’s not enough to give students the right

technology, but said they need guidance about how to use it.

1.Which of the following is TRUE according to the passage?

A. Most people spend nearly two hours texting a day.    

B. Most people spend about 20 minutes making three calls a day.

C. Most people spend mosttime of a day making phone calls.

D. Most time of a day is taken up by surfing the web.

2.Why don’t most people make a lot of calls?

A. Because calling can be more personal.

B. Because it doesn’t always save your time.

C. Because social media apps are important functions.

D. Because calling is more convenient.

3.What does the underlined word "one" in the second paragraph refer to (指代)？

A. Social media apps.

B. Navigation apps.

C. Mobile phones.

D. Particularly important functions.

4. The writer mainly wants to tell us        .

A. navigation apps such as Google Maps were popular

B. checking Facebook is carried out more frequently than making calls

C. the functions on a mobile phone have developed and improved drastically

D. students need guidance about how to use mobile phones