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.
Do some warming up exercise before sports. Or you _______ hurt yourself.
Teenagers ________ their sense of hearing because they always wear earphones.
What the sick child needs most now ______ love.
Many people _________ lose one of their senses have made great achievements.
—Do you mind my taking the books away ? —________.