单选题 The future of any society ___________ upon the character and competence of the young.

单选题 What's more, farmers didn't know the __________ between common cold and flu.

单选题 The story of Louis Slotin offers a clear ___________ of the interplay between personal and social responsibility.

单选题 You see, the part of China I grew up in was a rural village, and at that time ___________.

单选题 __________ kills more than 3 million children annually.

单选题 To develop as “whole persons” with clear directions and purposes, students need to ___________ responsibility, personal and social.

单选题 So when I realized that simple hygiene __________ like separating different animal species could contain the spread of the disease.

单选题 Since university is a ___________ time of life and curiosity, understandably, young people today may come to campuses in a state of bewilderment, leading to campus problems.

单选题 According to the World Bank, 12% of the world's __________ lives on less than $2 a day.