Unit 8 Whats this?习题习题 21、翻译下列句子。翻译下列句子。1. What is this? 2. This is my schoolbag. 3. What is that? 4. It is a pen. 5. How beautiful! 6. Its a pencil-box. 2、看图写单词。看图写单词。1. _2. _3. _4. _