单项选择题In the author’s opinion, it was surprising that ______.
单项选择题By saying Humans are social animals , the author means ().
A. they live all over the world B. they are different from other animals C. they live in one place, district or country, considered as a whole D. they are divided into many groups
单项选择题The doctor advised the author to go home and get his affairs in order because______.
单项选择题20().
A. feelings B. stories C. lives D. memories
单项选择题19().
A. passes on B. looks into C. throws away D. asks for