People were perhaps more honest a long time ago when life was very different from ( )it is today.
考试：
科目：（在线考试）
问题：
A：that
B：that what
C：which
D：what
答案：
解析：
【解析】根据空格前面的介词from可以推知， ( )it is today表达应是“名词性（宾语）从句”，与前面的介词from形成，，介宾关系”，逐项比对：
A项在引导名词性从句时，往往在从句中不充当任何成分，由此可知，该宾语从句仍缺乏表语，故错；B项同时出现两个从句引导词that和what,显然错误；C项在引导名词性从句时，后面常接被修饰的名词，而非单独存在，故错；D项引导名词性从句时，其语义=the +名词+定语从句，具体到本句，what it is today = the life (that it is today),其中the life充当前面介词from的宾语，而关系代词that则充当后面定语从句中的表语，与is形成系表关系，因此D正确。
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People were perhaps more honest a long time ago when life was very different from ( )it is today.
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