问题
选择题
Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
A．power
B．limit
C．control
D．mercy
答案
答案：D
题目分析：A. power权力，B. limit限制，C. control控制，D. mercy怜悯，仁慈，句意：直到工业革命的开始，人类一直很穷，很饿，受疾病和自然灾害的支配。At the mercy of…受…支配，选D。