单选题 1.  After seven years, a missing World War Ⅱ soldier for ______ his desperate relatives were waiting has finally come back.
【正确答案】 B
【答案解析】 七年后，一位失踪的二战士兵终于回来了，绝望的亲属们一直在等他。
   定语从句题。先行词soldier是从句中were waiting for的宾语，且介词for前置时，关系代词不能用who，只能用whom，故B为答案。