24.______Hemingway's inspiration for the book, The Old Man And The Sea, was the Cuban fisherman Gregorio Fuentes, who was also Hemingway's friend.
(A) Traced the history,
(B) It was said that
(C) Information on the origin,
(D) The indication that

20. Dyscalculia is a learning difficulty that impacts students' ability to do math. Children with dyscalculia usually have difficulty_______ numbers, symbols, and related concepts. (A) understand (B) understanding (C) to understand (D) to understanding

21. Did Penelope tell you______? (A) which bus did she take (B) when was she going to leave (C) what had caused the problem (D) who had she invited to the party

22. Leo decided to get divorced,______. (A) that was unavoidable (B) which upset his parents deeply (C) its impact on his children was huge (D) what would change his life completely

23. ______，Owen stormed out of the room and banged the door behind him. (A) Filled with anger (B) To fly into a rage (C) It was anger that built up (D) The fury that burned inside him

25.______，he was killed together with his whole army. (A) Never had the king surrendered (B) The king, trapped by the enemy (C) How fearlessly the king faced the enemy (D) Bravely as the king fought against the enemy

26. What is this passage mainly about? (A) Amputee resources. (B) Medical implant design. (C) Advanced artificial hands. (D) The brain-machine interface.

27. Which of the following will most likely benefit from the rescarch mentioned in the passage? (A) A born blind teenager. (B) A deaf old man. (C) A patient who lost his sight because of diabetes.(D) A man who lost his hand because of an accident.

28. All the following words can be used interchangeably in the passage except for (A) prosthetic. (B) peripheral. (C) bionic. (D) artificial.

29. According to the passage, which of the following is true? (A) Mind-controlled bionic limbs have been used for at least 50 years. (B) Patients with a mind-controlled prosthesis have to carry a mainframe computer with them. (C) A new implant using machine learning can give amputees control over their prosthetic hands. (D) The artificial hand using the brain-machine interface involves no surgery, and therefore is very cheap.

30. The paragraph following the passage most likely discusses (A) how a mind-controlled prosthesis works. (B) why amputees want to protest prosthetics. (C) whether the brain-machine interface will change the way we live. (D) the possibility that robots can carry out all sorts of daily tasks in the near future.