The time and effort he has devoted during the past few years________ trees in that remote area is now considered to be of great value．

Why do you think David is the suitable person for the job?— Because he has higher ambitions _________ others have already been satisfied.

Regular exercise________our health；that is to say，our health can________it.

The teacher together with the students________discussing Reading Skills that________newly published in America. [ ]

Basketball players need to eat ______.