↑ 收起筛选 ↑
试题详情

Because of the shortage of coal in England, attempts ________ to use natural gas as a source of power.

A. have made                            B. will have been made

C. are being made                        D. will be making

高一英语单项填空中等难度题

少年,再来一题如何?
试题答案
试题解析
相关试题