Помогите, пожалуйста! 
 Open the brackets. 
1.The English ( to know ) to be great tea drinkers.
2.They ( to suppose ) to be great animal lovers.
3.They ( to believe ) to be sociable. 

1.The English are known to be great tea drinkers.2.They are supposed to be great animal lovers.3.They are believed to be sociable.