题目内容：

That was ___that i had no choice but to call the police
A:such serious a matter
B:so serious matter
c:such a serious matter
D:so a serious matter
选哪个?为什么?（我现在正在初学英语,

优质解答

C...
或是..so serious a matter
如果后面用that 的固定用法...
so adj a n ＝such a adj n．