Question

【題目】My father served in the army in ________ when he was in ________.
A.1950s; twenties
B.the 1950s; his twenties
C.the 1950s; the twenties
D.1950s; his twenties

Answer 1

【答案】B
【解析】句意：我父親在20世紀(jì)50年代他20多歲的時候在部隊服役。in the+整十年代的復(fù)數(shù) 在……年代；in one's 整十的復(fù)數(shù) 在某人幾十多歲的時候。因此選Ｂ。