问题补充:
My brother is three years than I.
A. elder; elder
B. older; older
C. elder; older
D. older; elder
答案:
A. elder; elder
B. older; older
(答案→)C. elder; older
D. older; elder
解析:句意:我哥哥比我大三岁。elder,older是old的两种比较级形式,都有“年长的”意思 (old还有“较旧的”意思)。但是二者用法不同。elder通常于名词前作定语用,而不能用在be动词或系动词后作表语,而older作“年长的”解时,则正好与之相反,它用作表语,而不用作定语形容词。所以选C。