Я не уверена, но я считаю так:
8. b
9. c
10.b
11.b
12. b
13. a
14.a
15. b
1. Dark kind of chocolate is best for me.
2. Pilots take some chocolate with them because chocolate helps to think and concentrate.
3. I feel happy when I eat some chocolate because it has the right chemicals.
.................................
Eye, face, arm, shoulder, hair, leg, knee, вроде-бы всё
Ответ:
4) has never been in Australia
5) is thinking
6) works
7) makes