33. According to the article and line graph, which field probably has the lowest percentage of women today?
(A) biology
(B) physics
(C) computer science
(D) engineering

29. The phrase stumbled on in paragraph 5 is closest in meaning to ________. (A) discovered by chance (B) was slowed down by (C) worked on (D) passed by

30. The first rock that Curiosity examined did NOT indicate that ________. (A) Mars once had liquid water on its surface (B) the rock contained possible sources of energy (C) microorganisms inhabited the pond where the rock formed (D) the rock contained the basic building blocks of living organisms

31. The author mentions the photographers William Henry Jackson and Ansel Adams in part because ________. (A) The landscapes that they photographed resembled the ones that Curiosity photographed. (B) Their photos, like the ones taken by Curiosity, captured the public's imagination. (C) Like Curiosity, they employed the most advanced photographic technology available. (D) Their images inspired the engineers and scientists who designed and built Curiosity.

32. In the concluding paragraph of the article, the author ________. (A) describes the difficulties of Curiosity's trip to Mount Sharp (B) summarizes his feelings about Curiosity's photos (C) refers back to the introductory paragraph (D) urges the reader to learn more about Mars 

34. According to the article, which of these factors does NOT contribute to the low numbers of women in the STEM fields? (A) Many women take time off from work to raise a family. (B) Women who work in these fields are sometimes harassed by co-workers. (C) Young girls are often directed toward non-scientific or non-technical careers. (D) There is a systematic institutional bias against the hiring of women in these fields.

35. According to the line graph, in which field did women's participation grow the most? (A) life and physical sciences (B) the social sciences (C) engineering (D) computer-related fields

36. Rod Terry says that lifeguards need to be able to ________. (A) do all sorts of athletic moves (B) pay attention to detail (C) work very hard (D) adapt easily

37. According to Rebecca Surridge, lifeguards ________. (A) have restricted control over people (B) work in a restricted number of areas (C) are qualified to treat restricted injuries (D) look after a restricted number of people

38. The ________ influences a lifeguard's decision to put up a red flag. (A) quality of the sea water (B) weather conditions (C) presence of fish in the sea (D) number of people on the beach

39. How do lifeguards maintain their levels of concentration? (A) They take a long break each day. (B) They work no more than four days a week. (C) They ask other lifeguards' opinions on their work. (D) They switch among the duties involved in their job.