—How did you go home after the party last night？ —Well there were no buses we had to walk.

问题补充：

—How did you go home after the party last night？

—Well，there were no buses we had to walk.

A. so as to

B. in order to

C. so that

D. in order that

答案：

A. so as to

B. in order to

(答案→)C. so that

D. in order that

解析：：词义辨析。AB为了（后面不能接句子）；C以至于（后面接句子）D为了（后面接句子，表示目的）；句意：—昨天晚上聚会以后你是怎么回家的？一辆公交车都没有以至于我们不得不步行回家。故C正确。