He asked his father .
A. where it happens
B. what was happen
C. how it happened
D. what happens
网友回答
A. where it happens
B. what was happen
(答案→)C. how it happened
D. what happens
解析：此题重点考查宾语从句的时态和语序问题，无论哪种句式结构充当宾语从句都要用陈述句语序，从句的时态要和主句的时态保持一致。因主句的谓语动词是过去式从句的谓语动词也要用相应的过去时态。