Passive voice - MIXED TENSES Mobile phones

Currently, mobile phones _______ by 6.8 billion people.

• are used

• were used

• have been used

• will be used

Alarmingly, 5.3 billion mobile phones _______ thrown away every year.

• are

• were

• have been

• will be

The first mobile phone call _______made on April 3, 1973,

• is

• was

• has been

• will be

Of all mobile phones in the world, 90% ________ produced in China alone.

• are

• were

• have been

• will be

The first text message ____________sent  in 1989.

• is

• was

• has been

• will be

Since then trillions of  texts _____________sent worldwide.

• are

• were

• have been

• will be

. Camera phones ____________sold  since 2002

• are

• were

• have been

• will be

‘Smartphones’ _____________ introduced in 2007.

• are

• were

• have been

• will be

Over the years a multitude of amazing features ________ added including Internet browsing, email, mp3 players, video, and camera.

• are

• were

• have been

• will be

In 2008, 500 apps ________ uploaded on Apple’s iPhone. Now there are over 2 million.

• can be

• could be

• have been able to be