单项选择题
In Ireland today about（）of the population are Roman Catholics.
A.75% B.80% C.90% D.93%
单项选择题 The population of Ireland is predominantly of（）origin.
单项选择题 The population decreased from the 1840s until about 1970,largely because of（）.
单项选择题 Ireland is unique among European countries for（）.
