---Why did he get up so early in the morning?- He got up early in order that he could c

问题补充：

---Why did he get up so early in the morning?

--- He got up early in order that he could catch the early bus.

A. such that

B. so that

C. in order to

D. therefore

答案：

A. such that

(答案→)B. so that

C. in order to

D. therefore

解析：两者都是以至于的意思，