We have to ____ (postpone/prolong)the meeting until next week.

No one hopes that he will ______ his usefulness. A: retain B: keep C: prolong D: survive

The operation could______her life by two or three years.(2014-68) A: prolong B: increase C: expand D: continue

The operation could ___ her life by two or three years. A: prolong B: increase C: expand D: combined

In order to ______ the life of the machine, regular maintenance is required every month. A: insist B: endure C: persist D: prolong

The reform in economic system will help___ and develop the socialist economic base. A: consolidate B: enhance C: elevate D: prolong

The operation could prolong his life by two or three years. A: broaden B: worsen C: extend D: accelerate

The operation<br/>could her life by two or three years. A: prolong B: increase C: expand D: continue

The<br/>operation could ___ her life by two or three years. A: prolong B: increase C: expand D: combined

18 A: They expand our mind. B: They prolong our lives. C: They narrow our focus. D: They lessen our burdens.