Câu hỏi:

     Bing Al is the name of Microsoft's new artificial intelligence system, (1) _______ can answer questions posed in natural language. It has been built to (2) _______ with similar systems from Google and Apple. The Bing AI team has trained the system by having it read the equivalent of 500 Wikipedia articles. The team then tested its ability to answer questions about (3) _______ articles and found that it was able to respond correctly more often than not.

     What sets Bing Al apart from other question-answering systems is its ability to ask clarifying questions. (4) _______ , if a user asks, "How tall is Barack Obama?", Bing Al may reply with "Which Barack Obama are you asking about? The president, or the basketball player?" This back-and-forth dialogue allows the system to better understand the user's intent and provide a more accurate response.

     (5) _______ unique feature of Bing Al is its ability to generate answers to questions that it has never seen before. In one test, the researchers asked the system "Who won the most recent World Cup?". The system was able to correctly infer the answer by using its general knowledge of current events.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 21 to 25.