问题
选择题
Have you noticed the problem ___ he is now in low spirit ? ____ come?
A．where, What
B．that, How
C．in which, For
D．what, As
答案
答案：B
that引导同位语从句，是problem的内容。后面的how come 意思是“怎么会那样？”符合上下文的意思。
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