用括号内所给动词的适当形式填空。Betty is often seen ______(help) the old man with his housework.
He prefers ______(take) part in the public activities rather than stay at home alone.
They ______(agree) with each other, so they argued for a long time.
Animals are our friends, so ______(protect) them is our duty.
You have ______(award) a scholarship to study violin at our School of Music.