Swimmers must be very strong in order to build up speed because of the high resistance of the water. Runners, ____, must struggle against the heavy resistance of the air and ground.
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.