答案和解析：
Section B
Passage One
Questions 26 to 28 are based on the passage you have just heard.
26. [A] Social challenge.[B] Physical challenge.
[C] Economic challenge.[D] Intellectual challenge.
27. [A] Painting a picture.[B] Building pymp3ids.
[C] Exploring the space.[D] Making plans for transportation.
28. [A] They ignore them.[B] They are afraid of them.
[C] They accept and enjoy them. [D] They are indifferent to them.
Passage Two
Questions 29 to 31 are based on the passage you have just heard.
29. [A] It eliminated many factory jobs.
[B] It allowed workers to live far from their jobs.
[C] It gave workers opportunity for better training.
[D] It allowed workers to spend more time at home.
30. [A] Increased transportation costs.
[B] The lack of a qualified sales force.
[C] A decline in the number of customers.
[D] Difficulty in transporting merchandise.
31. [A] Because property is more valuable in the city.
[B] Because prices are higher in downtown stores.
[C] Because job opportunities are better in the city.
[D] Because highway commuting has become unpleasant.
Section B
Passage One
Questions 26 to 28 are based on the passage you have just heard.
26. [A] Social challenge.[B] Physical challenge.
[C] Economic challenge.[D] Intellectual challenge.
27. [A] Painting a picture.[B] Building pymp3ids.
[C] Exploring the space.[D] Making plans for transportation.
28. [A] They ignore them.[B] They are afraid of them.
[C] They accept and enjoy them. [D] They are indifferent to them.
Passage Two
Questions 29 to 31 are based on the passage you have just heard.
29. [A] It eliminated many factory jobs.
[B] It allowed workers to live far from their jobs.
[C] It gave workers opportunity for better training.
[D] It allowed workers to spend more time at home.
30. [A] Increased transportation costs.
[B] The lack of a qualified sales force.
[C] A decline in the number of customers.
[D] Difficulty in transporting merchandise.
31. [A] Because property is more valuable in the city.
[B] Because prices are higher in downtown stores.
[C] Because job opportunities are better in the city.
[D] Because highway commuting has become unpleasant.