We asked six students what yesterday.A. do they doB. did they doC. they didD. they do

问题补充：

We asked six students what yesterday.

A. do they do

B. did they do

C. they did

D. they do

答案：

A. do they do

B. did they do

(答案→)C. they did

D. they do

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。