51.  They didn't know how to make good use of their time at all.

52.  Some people don't know how to make good use of weekends.

53.  We should make good use of college life.

54.  So it is so important for us to make good use of studying and playing.

55.  We will make good use of this year to perfect our skills of basketball .

56.  I think that chance is all in our heads if we make good use of our chance, we will "go" further .

57.  Then, I can make good use of my advantage to serve society.

58.  In fact, he can make a good use of those time to think about the problems existing in his work, and find sloution to slove those problems.

59.  They want to make good use of their capacity.

60.  Thus we should make good use of time.