公共英语考试

【单选题】 The babies would "smile and bubble" at the lights because ______.
A．the lights were directly related to some basic "drives"
B．the sight of the lights was interesting
C．they need not turn back to watch the lights
D．they succeeded in "switching on" the lights

网考网参考答案：D
网考网解析：
[精解] 符合文章的主题：是成就感而不是有奖赏促使孩子做某些动作。 查看试题解析出处>>