第21题: [单项选择]Whenever we (hear of) a natural disaster, (even) in a distant part of the world, we feel (sympathy) for the people (having affected). A. hear of B. even C. sympathy D. having affected 参考答案:D 答案解析:人被(灾难)所影响,应该用被动语态,所以应改为having been affected.