Passage One
16. A) No one knows for sure when they came into being.
17. D) Carry ropes across rivers.
18. C) To prove that lightening is electricity.

Passage Two
19. C) She can speak several languages.
20. B) They have an intense interest in cross-cultural interactions.
21. C) She was able to translate for a German sports judge.
22. B) Taste the beef and give her comment.