Passage One

26, C. He specialized in interpersonal relationship.

27. D. Black freshman with high standardized scores

28, C. They broke up more often than same-race roommates

29, C. The racial attitudes improved.

Passage Two

30, A. It will help solve the global food crisis.

31, D. It is still far from being sufficient.

32, D. They are not as natural as we believed.

Passage Three

33, A. He was wrongly imprisoned

34, A. The two victims’ identification

35, B. Many factors influence the accuracy of witness testimony.