问题补充：
Many new will be opened up in the future for those with a university education.
A. opportunities
B. realities
C. necessities
D. probabilities
答案：
(答案→)A. opportunities
B. realities
C. necessities
D. probabilities
解析：opportunity常指“ (难得的应抓住的) 机会”, 既可作可数名词, 也可以作不可数名词用, 如：I had few opportunities of meeting interesting people there. They had not much opportunity for hearing good music in the remote area.
