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The first telephone ……………… in 1876 by Alexander Graham Bell.

• were invented

• is invented

• was invented

• be invented

People believe that all letters……………… with mobile phones and emails.

• has been replaced

• has replaced

• have been replaced

• have replaced

Centuries ago, urgent long distance messages ……………… by horsemen running days and nights.

• are delivered

• was delivered

• have been delivered

• were delivered

When you enter the shop, the latest models of mobile phones ……………… to you.

• will be shown

• will shown

• will show

• is shown

Many new features ................. to mobile phones by competing companies all over the world.

• is constantly adding

• are constantly adding

• is constantly being added

• are constantly being added

Usually, hundreds of consumes ................. before a new product is launched.

• are interviewed

• are being interviewed

• will interview

• has been interviewed

I bought a new MP3 player online yesterday and I think it .................to me by post now.

• will be sent

• is sent

• is being sent

• will send

There is no doubt that internet ................. communication much easier than ever before.

• have made

• has made

• has been made

• have been made

As a matter of fact, the youth ..... too much money on smart phones.

• is being spent

• are being spent

• are spending

• is spending

The prototype of a servant robot ..... for years and will be launched shortly.

• has been tested

• has tested

• has been testing

• have been tested