PRESENT TENSES

....... you .......... how to fix the tap?

• Have / known

• Are / knowing

• Do / know

.............. you ever ............ frogs' legs?

• Have / eaten

• Do / eat

• Is / eating

.............. she ever ............ London?

• Have / visited

• Does / visit

• Has / visitd

• Has / visited

David .................. how to play chess,but I don't.

• is knowing

• know

• knows

How often .............. you ................ to the gym?

• does / go

• do / you

• are / playing

Over one billion people regularly ................. social networking sites on mobile devices.

• access

• accesses

• has accesed

The number of LinkedIn ..................... very fast.

• increases

• is increasing

Users can follow different companies and also see who ................ their profile page.

• have already visited

• has already visited

• already visits

Professionals nowadays ............... the site to find jobs and business opportunities.

• are using

• use

• have used

I can't talk now. .i .................. for my exams.

• 'm studying

• have studied

• studies