Question

这个题怎么做，谢谢

Answer 1

一般来说:
while+延续性动词
when+瞬间动作
Tom was having a class while LiLei was climbing a mountain.
Lily was running while Keke was swimming.
Kelly was singing while Shallow was dancing.

Bob was reading when Tom opened the door.
Tom was watching TV when the phone rang.
She was writing when Sam knocked at the door.

Answer 2

A was running while B was swimming

A was dancing while B was singing

A was watching TV when the telephone rang
A and B were writing when C knocked at the door

A B C 换成你们书上画的那个人的名字