43. He used to take good care of many younger brothers and sisters when he was young so he has much __________ of working with kids. A. achievements B. consumption C. experience D. limitation 44. _________he doesn't have much free time, he always helps his friends when they have problems. A. Therefore B. Although C. But D. So 45. Elon Musk is the man___________ created the self-driving car and may take us to Mars. A. where B. whom C. whose D. that 46. She loves ducks,_______ ? A. doesn't she B. isn't she C. didnt she D. hasn't she 47. Louis ___________in Canada for twenty-one year A. has lived B. have lived C. has been lived D. have been lived 48. Jimmy has a unique talent for languages. He can learn to speak a language very well in just six months. The SYNONYM of "unique is __________ A. terrible B. limited C. special D. disappointed 49. I felt terrific last week when my teacher told me that I had won a scholarship. The ANTONYM of "terrific" is__________. A. happy B. proud C. terrible D. marvelous Find a mistake in one of the four underlined parts in the following sentence. 50. Everybody felt hungry and tired, so they sat down under the tree and have lunch.