将下面句子改为同义句.( 1. A. It's rude to point at anyone with your chopsticks. B. It's _____  _____ point at anyone with your chopsticks. 2. A. We should keep our classroom clean and tidy. B. Our classroom should _____ _____ clean and tidy. 3. A. It's raining hard, so we have to stay here for a while. B. It's raining _____ hard _____ we have to stay here for a while. 4. A. The little boy stopped crying and listened to music. B. The little boy didn't cry _____ _____ and listened to music. 5. A. There is only a desk in the room. B. There is_____ _____ a desk in the room