Listen ! There is a knock on the door. Who ________ it be?— It must be Jack. Just now I sent for him.[ ]

Everybody in the village likes Jack because he is good at telling and________jokes.[ ]

Sam _____ some knowledge of the computer just by watching others working on it.[ ]

Emma _______ her test paper until she checked it twice carefully.

His friends found to tell him everything that had happened.