Molly (tidy up) the house for two hours.
Molly has been tidying up the house for two hours.
Brenda (watch) cartoons since 3 o’clock.
Brenda has been watching cartoons since 3 o’clock.
My dad (already/watch) the latest news.
My dad has already watched the latest news.
His elder sister (yet/not/tidy up) her room.
His elder sister hasn’t tidied up her room yet.
Alice (feed) her baby for twenty minutes already.
Alice has been feeding her baby for twenty minutes already.
Recently I (feed) baby-lions in the zoo.
Recently I have fed baby-lions in the zoo.
Great job! Everything is correct.