Fall in the blanks with the correct form of verb.
Even though whales and fish both (e.g.) ___live___(live) in the water, they have many differences.
Whales(1) _______(live) in the water. They (2) ______(be) huge animals with smooth, rubbery skin. Whales have sideways tail fins that they (3) _______ (swing) up and down whale swimming. Even though they live in the water, whales(4)________(breathe) oxygen through blowholes. They (5) ________(bear) their young alive, giving birth to one baby at a time. Whales (6) ________(be) warm-blooded ; their body temperature never (7) ________(change).
Fish (8) ________(live) in water and (9) ________ (come) in all sizes. Most (10) ________(be) much smaller than whales. Fish (11) ________ (be) covered with thin, bony scales, and have fins that are atraight up and down. When swimming, fish (12) ________ (move) their fins from side. Fish breathe oxygen that (13) ________ (be) dissolved in water. Fish are cold-blooded ; their body temperature (14) ________ (change) with the temperature of the water. Most fish (15) ________(lay) many eggs in the water at a time.