_____in the sports world,a sportsman needs to train constantly to keep himself in best condition.
The two brothers _____ every day and there was no love left between them.
The teacher _____ her new students to be diligent.
Take on a(n)_______ with you. It looks like raining.
The road constant improvements can't keep pace with the increasing ____ .
We should take good care of our ____. Don't forget to rinse your mouth after meals.