Can you tell me _______ when I called you?

Can you tell me _______ when I called you?

答案C
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现在时从句的谓语动词可要用相应的任何时态。