按情景选择恰当的选项。 1. 当你想把自己的好朋友介绍给老师时，可以说： [     ] A. Miss Zhang, this is Jenny. B. I'm very well. C. Hello, Jenny. Nice to meet you. 2. 你想知道爷爷今天的身体好不好时，可以问： [     ] A. How old are you? B. How are you today? C. Nice to meet you. 3. 你想知道这是什么颜色的，可以问： [     ] A. What colour is it? B. What do they look like? C. What's this? 4. 你知道自己考了第一名，很高兴，可以说： [     ] A. I'm happy. B. I'm sad. C. I'm tired. 5. 你想告诉朋友，你爸爸是一名警官，可以说： [     ] A. My mother is a police officer. B. My father is a police officer. C. My father is a bus driver. 6. 你问同学，他在做什么，可以说： [     ] A. What is she doing? B. What is he doing? C. What are they doing?