【题目】Because of the shortage of coal in England, attempts ________ to use natural gas as a source of power.
A. have madeB. will have been made
C. are being madeD. will be making
在线课程【答案】C
【解析】
试题分析：句意：由于英格兰煤炭资源的匮乏，人们正试图使用天然气作为一种能源。主语attempts和动词之间被动关系，这里根据语境和语意应该用正在进行时的被动语态，故C正确。