have seen, the focus of medical care in our society has been __________ from curing diseases to preventing diseases—especially in terms of changing our many unhealthy behaviors.

At the meeting they discussed three different ______ to the study of mathematics.

We have some problems ________ the big bag.

It ___ be the postman at thedoor It’s only six o’clock

Tom put his heart into the wildlife research, and finally, his efforts ________ him great success and fame.[ ]