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 houses. Hob is interested in maths 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. She loves science. She says, 'I am going to explore space some day.' 'What do you want to be, Alice?' Joan asks me, 'Oh, I want to be a teacher when I grow up. I am going to teach in the countryside.' Each of us is doing his 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. Two students are interested in . [     ] A. medicine B. music C. space D. science 4. What does an engineer do? [     ] A. He takes care of patients in a hospital. B. He sings and dances for the people. C. He explores space. D. He builds bridges, roads and houses.