correct the errors if necessary. 1) while I drink tea, mother

correct the errors if necessary. 1) while I drink tea, mother was cooking. 2) when we was entering the room, we see that our son slept. 3) the party was great! the whole evening we enjoyed ourselves. 4) I wasn39;t sleeping at 10. at that time I walked my dog. 5) sara was being busy and she couldn39;t answer the phone. 6) alex was absent yesterday. he was at home doing his lesson. 7) I looked at Dan. he danced with Mary. 8) katy was trying to open the door when we saw her. 9) were you having a good time at the party? 10) granny was set in the arm-chair and began reading. 11) when Sue opened the door, she saw all her friends. 12) he didn39;t eat when I came yesterday. he was reading a book.