根据句意和首字母写出单词。 1. Students should be allowed to v________ and help others. 2. Birthday is a s________ day for everyone. 3. If we wore our own clothes, we would feel more c________ and that's good for studying. 4. I'm sorry to hear that you have f________ a math test. 5. At p________ I’m busy. I'll do it later on.