问题
选择题
The parents were in search _______ their son who was lost when the two countries were ______ war.
A．of; in
B．of; at
C．for; at
D．for; in
答案
答案：B
题目分析：考查固定词组。固定词组in search of 寻找…；at war在战争时；句意：当这两个国家处于战争状态的时候，这对父母正在寻找失踪的的儿子。故B正确。
点评：固定词组in search of 寻找…；at war在战争时