—Could you tell me last night?—Er I was watching TV at home.A. what you were doingB. wha

问题补充：

—Could you tell me last night?

—Er, I was watching TV at home.

A. what you were doing

B. what were you doing

C. what you are doing

D. what are you doing

答案：

(答案→)A. what you were doing

B. what were you doing

C. what you are doing

D. what are you doing

解析：本题tell后跟的是一个宾语从句，要用正常的陈述顺序，故本题不选BD，本题的回答语使用的是过去时，同时问句有过去的时间，故问句中的从句用过去时的一种，故本题选A。