fortune in introducing his invention. The farmers, however, were not interested in it,
claiming that the iron poisoned the soil and made the weeds grow. Nevertheless, many
people devoted their attention to the plow, until in 1869 James Oliver of South Bend,
Indiana, turned out the first chilled-steel plow.
1.What is the main topic of the passage?
(A) The need for agricultural advances to help feed a growing population
(B) The development of safer machines demanded by the labor movement
(C) Machinery that contributed to the agricultural revolution
(D) New Jersey as a leader in the agricultural revolution
2.The word "naturally" in line 3 is closest in meaning to
(A) unsurprisingly
(B) gradually
(C) apparently
(D) safely
3. The expression "make the most of" in line 4 is closest in meaning to
(A) get the best yield from
(B) raise the price of