根据句意及首字母提示写出所缺单词。 1. Only two rulers are red, the r_____ are yellow. 2. I'm worried about the s_____ of the children because they've never been there before. 3. Don't b_____ your father now. He's working. 4. You'd better wear a shirt and a t_____ . 5. When you are in t_____, you can turn to me for help.