◎ 题干
Have you noticed the problem ________ he is now in low spirits? ________ come?
[      ]
A. where; What 
B. that; How
C. in which; For  
D. what; As
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Have you noticed the problem ________ he is now in low spirits? ________ come? [ ]A. where; WhatB. that; HowC. in which; ForD. what; As…”主要考查了你对  【特殊疑问句】【同位语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。