单项选择题
A．She cannot stand her boss’s bad temper. B．She has often been criticized by her boss. C．She has made up her mind to resign. D．She never regrets any decisions she makes.
A．Einstein pushed mathematics almost to its limits. B．It will take another Einstein to build a unified theory. C．No physicist is likely to surpass Einstein in the next 200 years. D．It will be some time before a new Einstein emerges.
A．solve virtually all existing problems B．help raise people’s living standards C．quicken the pace of industrialization D．promote the nation’s social progress