English tenses

AI ... more and more efficient.

• are becoming

• become

• is becoming

• will become

Tom ... to his girlfriend when I ... him.

• was talking; saw

• talked; saw

• was talking; seed

• talked; was seeing

I ... very hard at the moment.

• work

• am working

• will work

• have worked

My little brother ... to school every day.

• is walking

• walks

• walked

• had walked

We ... to the USA last summer.

• went

• have gone

• had been

• go

The bank ... by the time I got there.

• closed

• closes

• has closed

• had closed

Dad .... while I ... the plants.

• cooked; watered

• was cooking; watered

• was cooking; was watering

• had cooked; watered

Mary ... Estonian for three years now.

• is learning

• learns

• will learn

• has been learning

I ... my best friend since primary school.

• has known

• know

• have known

• knew

We ... for hours when we stopped for a rest.

• have been walking

• had been walking

• were walking

• walked