Cloze Passage (4.1)Read the passage carefully and fill in the blanks with the most suitable word.
Mammals In The Sea
Most _______________ of mammals live on land. But mammal
____________ like whales, dolphins, seals and sea-lions live in the
sea. ____________ they can stay in water for long _____________
of time. Like all other mammals, they breathe air and need to surface
surface from time to time to breathe.
People often ____________ whales for fish because they look
so much like fish. Being mammals, whales have hair, they are warm-
blooded and their __________ drink milk from their mothers' bodies.
If a whale stays __________ too long, it will drown. Although whales
are big, most of them do not eat big things ______________ whales'
throats are very narrow.
Dolphins are small whales. They are playful and often _______
out of the water. Seals and sea lions are slightly ___________ from
whales. They are ____________ to come to land and ___________
about on their fin-feet.
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