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　　According to Science Daily, Professor Ashok Goel of Georgia Tech developed an artificially intelligent teaching assistant to help handle the enormous number of student questions in the online class, Knowledge Based Artificial Intelligence. This online course is a core requirement of Georgia Tech's online master's of science in computer science program. Professor Goel already had 8 teaching assistants, but that wasn't enough to deal with the daily barrage of questions from students.

　　Many students drop out of online courses because of the lack of teaching support. When students feel isolated or confused and reach out with questions that go unanswered, their motivation to continue tapers off. Professor Goel decided to do something to remedy this situation and his solution was to create a virtual assistant named Jill Watson, which is based on the IBM Watson platform.

　　Goel and his team developed several versions of Jill Watson before releasing her to the online forums. At first, the VA wasn't too great. But Goel and his team sourced the online discussion forum, to find all 40,000 questions that had ever been asked since the class was launched. Then they began to feed Jill the questions and answers. After some adjustments and sufficient time, Jill was able to answer the students' questions correctly 97% of the time. The virtual assistant became so advanced and realistic that the students didn't know she was a computer. The students, who were studying artificial intelligence, were interacting with artificial intelligence and couldn't tell it apart from a real human being. Goel didn't inform them about Jill's true identity until April 26. The students were actually very positive about the experience.

　　The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all questions posed by students on the online forum. The name, Jill Watson, will of course, change to something else next semester. Professor Goel has a much rosier outlook on the future of AI than say, Elon Musk, Stephen Hawking, Bill Gates or Steve Wozniak. Watch IBM Watson have a conversation with Ridley Scott:

　　46. What do we learn about Knowledge-Based Artificial Intelligence?

　　B) it is a course designed for students to learn online.

　　【定位】第一段首句。According to Science Daily, Professor Ashok Goel of Georgia Tech developed an artificially intelligent teaching assistant to help handle the enormous number of student questions in the online class, Knowledge Based Artificial Intelligence.

　　【同义替换】文章：帮助解决学生在线上课程的大量的问题。选项：帮助学生在线上学习。

　　47. What problem did Professor Goel meet with?

　　C) Students’ questions were too many to handle with.

　　【定位】第一段最后一句。Professor Goel already had 8 teaching assistants, but that wasn't enough to deal with the daily barrage of questions from students.

　　【同义替换】文章：这还不足以应付学生每天接二连三的提问。选项：学生的问题太多了。

　　48. What do we learn about Jill Watson?

　　A) She turned out to be a great success.

　　【定位】第三段第五句。After some adjustments and sufficient time, Jill was able to answer the students' questions correctly 97% of the time.

　　49. How did the students feel about Jill Watson?

　　D) They could not tell her from a real person.

　　【定位】第三段倒数第三句。The students, who were studying artificial intelligence, were interacting with artificial intelligence and couldn't tell it apart from a real human being.

　　【同义替换】文章：不能把它和真实的人类区分开来。选项：不能和真实的人类分辨开。

　　50. What does Professor Goel plan to do next with Jill Waston?

　　C) Assign her to answer more of students’ questions.

　　【定位】最后一段第一句。The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all questions posed by students on the online forum.

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