题目

题型：不详难度：来源：

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

B

解析

that引导同位语从句，用以说明problem的内容；后面的How come“怎么会那样”为固定搭配。