单项选择题
Ireland is one of the leading exporters of（）in Europe.
A.coal and iron ore B.silver and gold C.copper and aluminum D.lead and zinc
单项选择题 Industrial output has grown by an average of（）annually since tariff barriers were eliminated in 1977.
单项选择题 Sine the 1960s,（）has become the mainstay of the Irish economy.
单项选择题 In Ireland the agricultural enterprise producing the most income is（）.
