铁道标志形象的将“人”“工”二字组合是采用了（）的表现手法，体现了人民铁道的时代精神。
A、会意型
B、具象型
C、汉字型
D、象形文字型
参考答案：D
In the past half-century, average incomes _______ quickly in developed countries, yet happiness levels have remained almost the same.
A．have risen
B．had risen
C．rose
D．rise
—I prefer _____ outside rather than _____ inside.
—So do I. [ ]
A. to be, stay
B. to be, to stay
C. being, staying
