公共英语考试

【单选题】 The mice in northern Europe move when ______.
A．they give birth
B．the weather is bad
C．the place gets too crowded
D．they haven't enough food

网考网参考答案：C
网考网解析：
[分析] 关键信息为They leave their mountain homes when they become too crowded．故选C。 查看试题解析出处>>