The fact that people are afraid to go out at night is often a result of perceived (感知) danger ________actual danger.
______ for a long time, but he managed to catch up with his classmates at last.
I had just finished all my homework and was about to go to bed the phone rang.
--- How is Dennis getting along with his work? --- Well, he could always _______ a new idea for increasing sales.
When he came to the door, my father ___ him at once although he was now a very old man.
–Do you mind my smoking here?--______.