It was _ that he had to ask for help.A. such big a job B. so a big job C. so big a job D.

问题补充：

It was _ that he had to ask for help.

A. such big a job

B. so a big job

C. so big a job

D. a such big job

答案：

A. such big a job

B. so a big job

(答案→)C. so big a job

D. a such big job

解析：考查固定搭配。So big a job=such a big job.