问题
选择题
Scientists have come to the conclusion_______ the temperature on Earth is getting higher and higher.
A．what
B．that
C．which
D．when
答案
答案：B
题目分析：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
点评：做从句题时，首先看从句是否缺少成份，如果缺少就在关系代词里找引导词；如果不缺少成份，就在关系副词里选择引导词