see the children before they went to bed he came home earlyA. So as toB. In order toC. So

问题补充：

see the children before they went to bed, he came home early

A. So as to

B. In order to

C. So that

D. In order that

答案：

A. So as to

(答案→)B. In order to

C. So that

D. In order that

解析：考查短语及连词用法。本题的四个选项都可以在句子做目的状语。CD两项后面不能接句子；A项不能放在句首。句意：为了在孩子们上床睡觉之前看见他们，他很早就回家了。故B正确。