（1）. Dolphins _________ in a __________. ____________
（2）. Sometimes they __________ somebody’s life. ____________
（3）. Can __________ talk? ____________
（4）. They are sad and __________. ____________
（5）. They __________ their __________ with sounds. ____________
（6）. __________ make tapes of their sounds and study them. ____________
（7）. Many people __________ this. ____________
（8）. They don’t study, but they travel __________. ____________
（9）. Maybe they can’t talk with words, but they talk with ____ ____________
（10）. They say dolphins bring good __________. ____________