My dog, Hero, isn’t afraid of most things. But he is afraid of the vacuum cleaner(真空吸尘器). He always hide himself when Mum cleans the house. 81 ______ A few weeks ago, Mum took my new baby sister 82 ______ to home. Her name is Barbie. She has a room 83 ______ of her own. Hero seems to know this. 84 ______ Last Saturday, Mum began to clean the living-room, there Hero was. Barbie was sleeping 85 ______ in her room. Hero jumped out from under a chair and ran toward Barbie’s room. He sat down at the door. Mum went on the work. She came closer and closer 86 ______ Hero. But he didn’t move at all. 87 ______ Then Mum ran the cleaner right up to her 88 ______ front foot. Hero shook all over. But he didn’t 89 ______ let Mum to get by. "You can’t take the cleaner 90 ______ into Barbie’s room", he seemed to say.