he has to stay at home.___he has a bad cold.a.this is because b.that's whyc.so is it d.the reason is
问题描述：
he has to stay at home.___he has a bad cold.
a.this is because b.that's why
c.so is it d.the reason is
答
正确答案：a
d选项需要在is后加that才行,这样that he has a bad cold.就构成了表语从句.