问题
选择题
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
答案：B
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。
搜题请搜索小程序“爱下问搜题”