They do have  a different          to the  problem of overpopulation.

The __________ of his books among parents and the recommendation of experts both at home and abroad have quickly made him a celebrity educator.

Now that there are only a few minutes left, we’d better talk about the plan in _____.

—Jack is very clever and he studies hard as well.—No ________ he always comes out first in the exams.

To come back before Sunday, I have made a few minor ________ to the schedule of my trip.