After was about then minutes the teacher gave the students the correct answer to the que

问题补充：

After was about then minutes, the teacher gave the students the correct answer to the question.

A. what

B. that

C. it

D. which

答案：

(答案→)A. what

B. that

C. it

D. which

解析：考查宾语从句。句中After是介词，后面是宾语从句，且从句 was about then minutes缺少主语，所以用what引导，选A。