第20题: [单项选择]In the days when coal was so (widely) used, (no one) realized how soon and how (complete) oil would replace (it). A. widely B. no one C. complete D. it 参考答案:C 答案解析:[解析] 应改为completely。how修饰副词,并且soon和 completely并列。
A. predictability B. possibility C. feasibility D. undeniability 参考答案:B 答案解析:名词辨析题。predictability“可预见性”;possibility“可能性”;feasibility“可行性”;undeniablility“不可否定性”。结合句意可知[B]正确。