3 Read the article again. Complete the sentences.

Ответ:

1 Smartphones first appeared in 1994.

2 The first smartphone weighed 1/2 kg.

3 3 billion people in the world have a smartphone.

4 Users of one well-known messaging app send 60 billion messages every day.

5 In the UK, about 34 million people play games on their mobile devices.

6 2.5 billion people around the world have got social media profiles.