单选题 ______ annoys me a great deal to hear people blaming everything. Why can't they just be a little more positive?
【正确答案】 B
【答案解析】解析：考查形式主语。句意为“听到别人每件事都抱怨，我很烦。为什么他们不能更积极一点呢?”it作为句子的形式主语，替代真正的主语to hear people blaming everything，故选B。