Look at the pride on Tom’s face. He _____to have been praised by the manager just now.

Overuse of computers largelytothe failure of his eyesight，which is also a warningmessage for us all

_________ trees have been planted theseyears.

He lost both of his parents in the big earthquake, but _____for him, a kind couple adopted him and took good care of him [ ]

“Life is like walking in the snow”, Granny used to say, “because every step [ ]