4.1.The word "laborious" in line 8 is closest in meaning to

　　(A) unfamiliar

　　(B) primitive

　　(C) skilled

　　(D) difficult

　　(原文)Cotton could be grown throughout the South, but separating the fiber---or lint--from the seed was a laborious process.

　　4.2.The word "pits" in line 7 is closest in meaning to

　　(A) stages

　　(B) scars

　　(C) seeds

　　(D) holes

　　(原文)The Anasazi lived in houses constructed of adobe and wood. Anasazi houses were originally built in pits and were entered from the roof. But around the year 700 A.D., the Anasazi began to build their homes above ground and join them together into rambling multistoried complexes, which the Spanish called pueblos or villages.

　　5.1.The phrase "forward-looking" in line 4 is closest in meaning to

　　(A) progressive

　　(B) popular

　　(C) thrifty

　　(D) well-established

　　(原文)Ice was used in hotels, taverns, and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter.

　　5.2.The phrase "hinged on" in line 9 is closest in meaning to

　　(A) recovered from

　　(B) depended on

　　(C) started on

　　(D) contributed to

　　解析：(原文)Industrial growth hinged on several economic factors.