45．A．time             B．rest              C．game            D．meal

A

  Birds live in trees．But do you know that some frogs live in trees，too? The tree frog is not easy to get．It can change colours．On green leaves，it keeps green．On a yellow branch，it turns brown．Some tree frogs can change from green to gold or blue．

  Tree frogs have legs and wide feet．They have sticky pads（粘性肉垫）at the ends of their toes．These sticky toe pads keep the tree frogs from falling．Tree frogs have different（不同的）colours and markings（斑点）on their skins．Their eyes are different，too．Some have green eyes，and others have bright red ones．The sounds they make are different，too．One frog makes a sound like a dog barking．

  Another frog makes a loud noise like a snore（打鼾）．There is even a frog that whistles（吹口哨）．

    根据短文内容，选择最佳答案。

44．A．place            B．time             C．man             D．night

43．A．weekend       B．weekdays      C．Saturday       D．Sunday

42．A．in                B．on                C．to                D．for

41．A．hear             B．like              C．see               D．learn

40．A．radio            B．film             C．game            D．TV

39．A．sing             B．learn            C．dance                  D．hear

38．A．of                B．about            C．at                 D．with