里约奥运会虽已结束，但许多精彩的运动画面依然在我们脑海里闪现．从运动系统的组成来看，运动的动力来自（    ）

下列动物中，真正的陆生脊椎动物是（　　）

    Today is Sunday. The weather is fine. I go to the zoo with my parents. There are many animals at the zoo. Look！The pandas are eating bamboos(竹子) slowly. Two ducks are swimming in a lake. Two elephants are walking and a tiger is sleeping. I like monkeys best. They are jumping here and there. They like eating bananas. They are clever. Look! The bear is eating meat.
A. walking  B. swimming C. eating D. sleeping E. jumping

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