A.Right
B.Wrong
C.Not mentioned
3.Of the 32 categories,eight were produced only by the Irish dolphins.
A.Right
B.Wrong
C.Not mentioned
4.Whistles could also be used to communicate between adult dolphins and baby dolphins.
A.Right
B.Wrong
C.Not mentioned
5.Sperm whales can produce stronger ultrasonic waves to kill their prey than dolphins.
A.Right
B.Wrong
C.Not mentioned
6.As early as the 6th century,Irish nshermen started raising dolphins in the Shannon estuary.
A.Right
B.Wtong
C.Not mentioned
7.Irish dolphins attract tousts and over 25,ooo people come to see them every year.
A.Right
B.Wrong
C.Not mentioned
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