3.We have made numerous attempts to solve the problems，but so far our
efforts have been unsuccessful.
6.We note with satisfaction that all these activities have helped to
promote mutual understanding and friendship between two peoples.
4.State financial support given in the form of scholarships has
stimulated the students to greater efforts.
7.The population is leveling off in the area as a result of family
2.If you try to learn too many things at a time，you may get confused.
1.Too much work and too little rest may lead to loss of health
5.The pressures of modern urban life have led to increased occurrences
of alcoholi** and drug abuse，mental illness，*******，and
divorce in our society