A．He wonders if he’ll have enough time to do the job.
B．He fears that the job may be too boring.
C．He thinks Prof. Johnson has someone else in mind.
D．He is afraid he won’t know enough to do the job well.

A．The bird had finally understood his threat.
B．The bird managed to escape from the chicken house
C．The bird had learned to scream back at him.
D．The bird was living peacefully with the chickens.