1.He supported his argument by citing the example of European countries that he says are struggling to find enough workers.
cite 引用
She cites a favourite poem by George Herbert.
她引用了一首她所喜爱的乔治·赫伯特的诗 。
2.They do not want to work hard to feed a large family and that is why they opt for birth control and end up with one or two children only.
opt for 选择
They opt for more holiday instead of more pay.
他们选择了延长假期而不是增加工资 。