单项选择题
Industrial output has grown by an average of（）annually since tariff barriers were eliminated in 1977.
A.3% B.5% C.8% D.10%
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（）.
单项选择题 The economy of Ireland has been traditionally agricultural,but since （）country.sindustrial base has expanded.
