第二次工业革命以来，对全球经济迅速发展影响最大的自然资源是 [ ]
A．石油
B．电
C．水力
D．煤炭
答案：A
---- Have you heard of Steven Jobs, the co-founder and CEO of Apple?
---- Yes, but it’s a pity that he has _____ for a half year..
A．died
B．been dying
C．been dead
D．death
