单选题 In order to control and defeat the dreadful diseases that plague humanity, concerted activity is necessary.
【正确答案】 B
【答案解析】[解析] 句意：为了控制并战胜那些困扰人类的可怕的疾病，协调一致的行动是必不可少的。plague苦恼，困扰。trouble使烦恼，打搅。infect传染。eliminate消灭。deceive欺骗。