【题目】Scientists have come to the conclusion ___________ the temperature on Earth is getting higher and higher.
A. What B. that
C. which D. when
在线课程【答案】B
【解析】试题分析：考查从句，从句the temperature on Earth is getting higher and higher不缺少成份，what表示…东西，可以做主语、宾语、表语；which表示哪一个，可以做宾语和主语；when关系副词，表示时间；that只起引导作用，不做成份，所以选B