Now many countries find themselves still struggling with problems that are as old as man himself.Basic social problems such as poor or nonexistent health care, and nutrient-deficient diets continue to annoy developing countries, contributing to low life expectancy rates and hampering economic development.
　　While it may be true that some countries have found answers to these basic problems of humanity, this does not mean that their societies are problem-free.Indeed, in the solving of age-old problems more economically, advanced societies have found themselves facing new social problems, problems that are a direct outgrowth of their economic advancement.One such problem is that of aging.

[单选题]The old man devoted himself to( )for many years.A.teachB.teachingC.taughtD.

[单选题]Many old people in the cities find themselves unable to get used to the rap

The old man still denies ____ the book from the bookstore.（ ）A. to stealB. havin

As a single dad, he found himself struggling to meet too many responsibilities

[试题]Companiesarestrugglingtofindtheright_______betweensupplyanddemand,butitisnoeasytaskA．)equationB)formulaC)balanceD)pattern

[单选题]Many countries face a somewhat more serious economic problems in the form o

[单选题]Many countries face a somewhat more serious economic problems in the form o

[单选题]Many countries face a somewhat more serious economic problems in the form o

[单选题]Many countries face a somewhat more serious economic problems in the form o

[单选题]Many countries face a somewhat more serious economic problems in the form o