The new policy, if strictly______, is bound to benefit lots of low-income families

Dr Brown has the habit of _____ the room when  he is thinking about something troublesome. 

One way to ______ species under threat of extinction is to remove them to zoos and parks and feed them there.

He really succeeded and he___his success to his hard work.

—Believe me，all your efforts will ______ some day.—Thanks for your encouragement.