在职研究生英语（一）
阅读短文，选出填入空格最合适的一项： Tidal power is often …
第 5 题单选题模拟题较易
阅读短文，选出填入空格最合适的一项：
Tidal power is often described as the most predictable kind of renewable energy. Unlike wind and sunshine, which come and go, the tides rise and fall on a timetable that can be calculated years ___.
首句定调完形填空解题步骤