英语9.Because if the shortage of coal in England,
问题描述：
英语9.Because if the shortage of coal in England,
9.Because if the shortage of coal in England,attempts ________ to use natural gas as source of power.
a.have made b.having made c.are being made d.will be making
为什么
答
（开头应该是Because of吧?这个意思就是“由于英格兰煤炭资源的匮乏,人们试图使用天然气作为一种能源”
attempt是名词,尝试、试图的意思,空里应该填have been made或者are being made
C对