We ______ for one hour this morning. (and it is still morning)
- have played
- played
He has walked ______ three hours.
- for
- since
I have been very busy ______ last week.
- for
- since
I ______ the horse this morning. ( It is 9 am )
- have ridden
- rode
We ______ since early yesterday morning.
- have worked
- worked
He ______ on Sunday.
- studied
- has studied
We have worked ______ two days.
- for
- since
He ______ his mother when she was sick.
- helped
- has helped
We _______ the park last year.
- saw
- have seen
I _______ him for many years. (he is still alive)
- have known
- knew