一道英语选择题.
问题描述：
一道英语选择题.
That you do morning exercises every day ____ good for your health.
do/does/are/is
选哪个?
答
is
这是THAT 引导的一个从句,you do morning exercises做整句的主语,every day状语修饰 do morning exercises ,is,做整句的谓语