根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。在标有题号的横线上，完整写出空缺处所填单词的正确形式。
       Remember to be a good boy or a girl any time. It's i____  to have good manners, especially in some p____ places. When you are waiting in line, don't jump the queue. Be p____ . Don’t stand too close to others in the line. Keep 20cm a____  if you can.
     F____  the advice of the workers when your are having a visit on a place of interest. Do not climb on exhibitions. Make s____ it's OK to take pictures before you hold up your camera. When you go to shows, w____  clean clothes. You should get to the show 15 minutes before it starts. During the shows, turn o____ your cell phone. Don't eat during the show. Restaurants will be quite busy. Don't stay too long when you finish eating. Remember to t____ your rubbish away after the meal.
    Good manners can make you a g____ or a lovely lady. Wherever you are, others will be pleased with you.

为缓解旱情，实施人工降雨．飞机在高空投撒干冰（固态二氧化碳），干冰进入冷云层，就很快 ____成气体，并从周围吸收大量的热，使空气的温度急剧下降，空中的水蒸气便 ____成小冰粒，这些冰粒逐渐变大而下降，遇到暖气流便 ____为雨点降落到地面．