根据短文内容，回答短文后面的问题。 Mr. Zhang is our science teacher. His class is very interesting. We can learn a lot from his class. We like him very much. He often helps us to make things. We make a lot of things. Some of us make model planes. Some make model boats. Others make robots. Look at the robot. We like it very much because it can do many things for us. It is now cleaning the windows of an office building. It is not easy for the workers to do this job because that is a very tall building. 1. What is Mr. Zhang? _______________________________________________ 2. Do the students like Mr. Zhang? _______________________________________________ 3. What do the students make? _______________________________________________ 4. Why do the students like the robot? _______________________________________________ 5. What's the robot doing now? _______________________________________________