They need to spend more time _____ their health.
A. in B. on C. at D. of
We are so tired. Let’s stop _____ a rest.
A. to have B. having C. had D. has
He doesn’t seem _____ many friends.
A. to have B. having C. had D. have
We have nothing against ______ exercise.
A. do B. doing C. to do D. does
Our classroom must _____ clean every day.
A. keep B. to keep C. be kept D. to be kept
Your hobby got in the way ____ your study.
A. of B. in C. at D. for
