(
C
) 1. The word “school” means “______” in the passage.
A. a place for students to study B. a special kind of animals
C. a group of fish travelling together D. a place for training dolphins
(
D
) 2. Dolphins make a sound to ______.
A. show other dolphins they are happy
B. tell other dolphins they are sad
C. let people know they are afraid
D. give information to other dolphins
(
B
) 3. People can’t hear dolphins’ sounds under the water ______.
A. because they are very, very low
B. because they are very, very high
C. because they only make a few sounds
D. because they want to keep the sounds as a secret
(
C
) 4. Dolphins would like to ______.
A. study at schools B. be in shows
C. stay with other dolphins D. be away from their schools
