A. His friend gave him the wrong key.
B. He didn't know where the back door was.
C. He couldn't find the key to his mailbox.
D. It was too dark to put the key in the lock.
A. It was getting dark.
B. He was afraid of being blamed by his friend.
C. The birds might have flown away.
D. His friend would arrive any time.
A. He looked silly with only one leg inside the window.
B. He knew the policeman wouldn't believe him.
C. The torchling made him look very foolish.
D. He realized that he had made a mistake.