听下面一段材料,完成第1至第5小题。
1. Some ants in America can be very ______.
A.heavy
B.strong
C.thin
2. People and animals are afraid of ______.
A.one kind of ants
B.all kinds of ants
C.small ants
3. People get away from the ants because ______.
A.they can travel in large groups
B.they can eat and kill elephants
C.they can even kill people
4. People are sometimes glad after the ants pass through because ______.
A.they can see no insects (昆虫) or snakes
B.ants kill and eat elephants
C.they have no wooden houses
5. The story is mainly about ______.
A.a strong snake
B.a strong ant
C.a strong elephant