阅读理解。 Jack and Hob are going to high school now. Jack wants to be an engineer. He is going to build roads, bridges and house. Hob is interested in math and science, but he is going to study medicine. He wants to be a doctor. Kate is good at music. She wants to be an artist. She is going to sing and dance for people. Joan wants to be a woman astronaut (宇航员). She says,' I am going to expore (探险) space (太空) some day.' 'What do you want to be, Alice?'Joan asks me, 'Oh, I want to be a teacher. When I grow up, I'm going to teach in the countryside.' Each of us is doing his or her best at school. I am sure we will do something good for our country. 1. ______ students are talking. [     ] A. Two B. Three C. Four D. Five 2. Who wants to be an artist? [     ] A. Joan. B. Jack. C. Kate. D. Alice. 3. Three students are interested in ______. [     ] A. medicine B. music C. space D.science 4. What does Joan want to be? [     ] A. An astronaut. B. A teacher. C. A doctor. D. An engineer. 5. Where does Alice want to teach? [     ] A. On a farm. B. In the countryside. C. At home. D. Abroad (国外).