按要求变化下列各句
Lisa was on duty yesterday afternoon. （对划线部分提问）
____ was on duty yesterday afternoon?
The students had a piano lesson last Monday. （改为否定句）
The students ___ ___ a piano lesson last Monday.
Claudia was at the culture club this morning. （改为一般疑问句）
____ ___ at the culture club this morning?
It’s Friday today. （对划线部分提问）
____ ____ is it today?
They were at the office yesterday. （对划线部分提问）
____ ___ they yesterday?