I noticed him ( ) (clean) the room at this time yesterday 填什

I noticed him ( ) (clean) the room at this time yesterday 填什 I saw him ____(play)the piano this time yesterday. They were cleaning the room at this time yesterday.(改为同义句) I noticed Tom ____ the room yesterday morning.A.cleaning B.c I s____ you p____ with dolls at this time yesterday 横线上填什么 we heard the girl _(sing)at this time yesterday ,中间填?为什么? I noticed he entered the room. I helped him clean the room为什么clean 是原形；那My teacher asked me I heard the girl ___(sing) in her room at this time last nig I was playing the guitar at this time yesterday 对 playing th 48.I was studying for the English__ at this time yesterday.4 I saw him leave the office an hour ago.He ____ at this time.