— they to the concert ?—No. They stayed at home and watched TV. A. Do ; goB. Did ; go C.

问题补充：

— they to the concert ?

—No. They stayed at home and watched TV.

A. Do ; go

B. Did ; go

C. Have ; gone

D. Are ; going

答案：

A. Do ; go

(答案→)B. Did ; go

C. Have ; gone

D. Are ; going

解析：本题的回答语是过去时，故上句的一般疑问句也用过去时，go为一般动词，应该用did构成一般疑问句，故选B。