What will we do when all the oil in the world has ?A. run out ofB. been given outC. been u

问题补充：

What will we do when all the oil in the world has ?

A. run out of

B. been given out

C. been used up

D. given off

答案：

A. run out of

B. been given out

(答案→)C. been used up

D. given off

解析：考查词组：ABC都有“用完”的意思，run out of是及物动词短语，应该是被动语态，give out 跟run out 一样，无被动。Use up用被动形式， been used up， give off是散发，选C。