When I see the envelope from school in the mail 中为什么用see 而不用

When I see the envelope from school in the mail 中为什么用see 而不用 I always get nervous when I see the envelope feom school in I always get nervous when I see the envelope _____ school __ I always ____ ____ when I see the letter from school in the what did he see when he went into the office?这里为什么用when而不用别的 Have you seen the TV play?这句话中为什么用see而不用watch? I always got nervous when i saw the envelope form school in There was a time when I hated to go to school 句中为什么用a 而不用the We can see the smoke rising from the chimney.为什么用rising不用rai i'll see you in the morning 为什么不用at?I work all day and often We stood at the top from where we could see town.为什么用where不用 I________ see him when I was walking in the street.