《2025年教与学课程同步讲练八年级英语上册外研版》

Easton, a 14-year-old student, liked to make things in his free time. He 21. built(build) a robotic arm out of plastic blocks and fishing line, so he came to the science fair with his work. 22. To his surprise, a girl named Jenny greeted him with a smile. She was born without an arm, and her artificial arm 23. cost(cost) her $80,000. What's 24. worse(bad), she would grow quickly and need arms all the time. This really blew Easton away, so he wanted 25. to lend(lend) a hand to her.After this fair, Easton stayed in his room all day and tried to improve his work. When he was 16 years old, he got a 3-D printer and with it he invented 26. an artificial arm. It was able to move with brain signals of the user, 27. but it was too heavy for a child. So he kept working on it. He enjoyed 28. fixing(fix) problems one after another, and finally he hit on success at the age of 23. His design was much lighter and cheaper. It looked wonderful with a(n) 29. weight(weigh) of 0.5 kilograms and the cost of $500. Easton was more than excited, and he decided to post his design online... for free. People can download it and make 30. their(they) own artificial arms with the 3-D printers. What a helping hand!

答案： 21. built 22. To 23. cost 24. worse 25. to lend 26. an 27. but 28. fixing 29. weight 30. their

1. From the passage, we know that Alexa ______.(D)
2. The underlined word "rare" in the passage probably means "______".(C)
3. What's the best sentence to fill in the blank?(A)
4. Paragraph 4 mainly tells us that when people try voice shopping, ______.(B)

答案： 1—4 DCAB