1. According to Paragraph(段落)One, an elephant herd ().
A. has a father elephant as the leader
B. owns a matriarch who keeps it away from danger
C. always has several leaders and hundreds of elephants
2. Long memories help elephants to ().
A. choose their matriarch
B. communicate with each other
C. find water and cross the river
3. What does the underlined word “rumbling” mean? ()
A. 低沉的
B. 尖细的
C. 高亢的
4. Why do the adult elephants circle around their babies? ()
A. To keep their babies safe.
B. To welcome their friends.
C. To attack their enemies.
5. The passage mainly tells us about ().
A. why the elephants live in herds
B. what the elephants' living habits are
C. how the elephants avoid being attacked

1. B；2. C；3. A；4. A；5. B