1. C.Most drivers feel uncertain about the safety of self-driving cars.
2. A.Their drivers would feel safe after getting used to the automatic devices.
3. C.Attacks on some Iditarod race competitors.
4. B.He has won the Alaska Iditarod Race four times.
5. D.It turned over because of strong winds.
6. D.32.
7. B.He is being investigated by the police.
8. C.At an accountancy firm.
9. A.Helping out with data input.
10. B.He needs the money badly.
11. D.Review some accountancy terms.
12. B.They are poor at technology skills.
13. A.Japanese.
14. D.Literacy.
15. C.It has much room for improvement.
16. A.They have small roots.
17. D.They began to look like modern-day carrots.
18. B.There were serious food shortages.
19. A.She could update her family any time she liked.
20. B.She enjoyed reading her friends' status updates.
21. D.She didn't seem to be doing as well as her Facebook friends.
22. A.They have strong muscles.
23. C.It was brought over from Spain.
24. C.They showed and traded animals in the market.
25. B.The arrival of tractors.