The People's Republic of China was founded in 1949.

单项选择题If parents are not careful, children tend to neglect their homework.

单项选择题The doctor explained to the students the hazards of radiation upon human beings.

单项选择题The very north and south regions are covered with ice and snow.

单项选择题Argument among the speakers at the conference is bordering on violence.

单项选择题You could condense all the worthwhile information in this book into a few pages.