第25题: [单项选择]Nowadays the doctors are trying their best to reduce the people’s fear ______ they would be affected by the present disease called "Bird Flu" (禽流感) . A. whether B. which C. that D. when 参考答案:C 答案解析:fear后为同位语从句。在同位语从句、表语从句、主语从句中的引导词that一般不省略,故选C。