问题补充:
---All the oil in the world will have some day.
---Yeah. What shall we use for power at that time?
A. given away
B. put away
C. run out
D. set out
答案:
A. given away
B. put away
(答案→)C. run out
D. set out
解析: 四个选项分别表示泄露、储存、用完和出发,根据题意选C,世界上的石油有一天会用完。