根据首字母，填出正确的单词。
1. Don't s _____ in class. Keep awake, please.
2. A g ______ has a very long neck. It's a beautiful animal.
3. A dolphin is very i ________ because it can act as people do.
4. It has an u _____ face. We are afraid of it.
5. The panda is very shy, so please be very q ________.
