III.Choose the best answer: 15. The problems .................. Tony has seem insurmountable. a. what b. he c. that d. θ 16. The man ............. I introduced you to last night may be the next president of the university. a. which b. whom c. that d. θ 17. Cathy is trustworthy. She's a person upon ............... You can always depend. a. who b. whom c. that d. θ 18. Your career should focus on a field in...............you are genuinely interested. a. which b. what c. that d. θ 19. People ................. outlook on life is optimistic are usually happy people. a. whose b. whom c. that d. which 20. Ms. Donaldson,................. teaches linguistics at the university, recently re¬ceived recognition for her research. a. who b. whom c. which d. that 21. The earth, ................ is the fifth largest planet in the solar system, is the third planet from the sun. a. who b. whom c. which d. that 22. The check................I gave Oliver was for work he'd done for me. a. who b. which c. that d. θ 23. Melanie was looking after a dog..............leg had been broken in an accident. a. which b. whose that d. its 24. One of the people arrested was Mary Arundel, ................. is a member of the local council. a. that b. who c. whom d. 0 25. The Titanic,................sank in 1922, was supposed to be unsinkable. a. whose that . c. which d. who 26. The Newspaper is owned by the Mearson Group, ....................... chairman is Sir James Bex. a. which c. that c. who d. whose 27. She is one of the few people to ............. I look up. a. who b. whom c. that d. 0 28. Genghis Khan, _________ name means “very mighty ruler”, was a Mongol emperor in the Middle Ages.