47. What does the author think about school field trips?
A) They enable students from different backgrounds to mix with each other.
B) They widen the gap between privileged and disadvantaged students.
C) They give the disadvantaged students a chance to see the world.
D) They only benefit students with rich relatives and neighbours.
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48. What does the author suggest can help build community spirit?
A) Events aiming to improve community services.
B) Activities that help to fuel students' ingenuity.
C) Events that require mutual understanding,
D) Activities involving all students on campus.
49. What do we learn about low-income parents regarding school field trips?
A) They want their children to participate even though they don't see much benefit.
B) They don't want their kids to participate but find it hard to keep them from going.
C) They don't want their kids to miss any chance to broaden their horizons despite the cost.
D) They want their children to experience adventures but they don't want them to run risks.
50. What is the author's expectation of schools?
A) Bringing a community together with ingenuity.
B) Resolving the existing discrepancies in society.
C) Avoiding creating new gaps among students.
D) Giving poor students preferential treatment.
51. What will happen by 2100, according to a new study?
A) King penguins in the Antarctic will be on the verge of dying out.
B) Sea water will rise to a much higher level around the Antarctic.
C) The melting ice cover will destroy the great Antarctic wilderness.
D) The pristine waters around the Antarctic will disappear forever.
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