1.Too much work and too little rest may lead to loss of health

　　2.If you try to learn too many things at a time，you may get confused.

　　3.We have made numerous attempts to solve the problems，but so far our efforts have been unsuccessful.

　　4.State financial support given in the form of scholarships has stimulated the students to greater efforts.

　　5.The pressures of modern urban life have led to increased occurrences of alcoholism and drug abuse，mental illness，suicide，and divorce in our society

　　6.We note with satisfaction that all these activities have helped to promote mutual understanding and friendship between two peoples.

　　7.The population is leveling off(处于平衡状态) in the area as a result of family planning.

　　表示条件和假设的结构

　　1.Were it left to me decide whether we should have a government without newspapers or newspapers without a government，I should not hesitate a moment to prefer the latter.

　　2.Without a degree and with no experience in teaching my chances of getting the job is silm.

　　3.With the introduction of foreign capital，we hope to step up the development of national economy.

　　4.Whether day or night，summer or winter，temperatures in the underground world remain equable and nearly constant