Jim was ___ at this time yesterday.

Jim was ___ at this time yesterday. he was -------at this time yesterday Jim and I games at this time yesterday morning The policeman asked me ___ at this time yesterday. He was riding a bike at this time yesterday. She was washing some clothes at this time yesterday. He was ___a plane at this time yesterday Lana was doing homework p____ at home this time yesterday she was writing a letter this time yesterday Jim had finishe We at this time yesterday at this time yesterday与this time yesterday的区别 this time yesterday还是at this time yesterday?