he took a deep breath ___calm down.A .so as to B.for C.in order that D.and 求原因!
问题描述：
he took a deep breath ___calm down.A .so as to B.for C.in order that D.and 求原因!
答
【A】他深呼吸了一下,让自己平静下来.
so as to 做了目的状语.
for后面加doing
in order that后面跟句子,calm down构成句子不完整
and表达不出目的的含义