It’s useless envying others their success.It’s time you ________ hard.
Our neighbor has ______ ours.
. Atlanta, a Greek princess, was very beautiful and could run faster than ________man in Greece.
She could not speak, nor ______anything we said.
Why many adolescents (青少年) have trouble communicating with their parents lies in _____we call “generation gap.”
You’ve been working all morning — I think you _____a rest.