By mentioning “traffic light” and

　　“windshield wiper”，the author indicates that countless inventions are ______.

　　A. beneficial，because their inventors are famous

　　B. not useful，though their inventors are famous

　　C. not useful，because their inventors are less famous

　　D. beneficial，though their inventors are less famous

　　Professor Joan McLean's course aims to ______.

　　A. add colour and variety to students' campus life

　　B. prepare students to try their own inventions

　　C. carry out the requirements by Mountain University

　　D. inform students of the windshield wiper's invention

　　Tommy Lee's invention of the unbreakable umbrella was ______.

　　A. inspired by the story behind the windshield wiper

　　B. not eventually accepted by the umbrella producer

　　C. due to his dream of being caught in a rainstorm

　　D. not related to Professor Joan McLean's lectures

　　Which of the following can best serve as the title of this passage?

　　A. How to Help Students to Sell Their Inventions to Producers?

　　B. Shouldn't We Develop Invention Courses in Universities?

　　C. Shouldn't We Know Who Invented the Windshield Wiper?

　　D. How to Design a Built­in Device for Cleaning the Window?

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