Some so-called climate travelers in one place for a few months and then move on to some o

问题补充：

Some so-called climate travelers in one place for a few months and then move on to some other places as the weather changes.

A. have stayed

B. are staying

C. stay

D. stayed

答案：

A. have stayed

B. are staying

(答案→)C. stay

D. stayed

解析：这里是讲的是客观情况，故用一般现在时。从下文的“as the weather changes”我们也可以知道用一般现在时。句意：一些所谓的气候旅行者在一个地方呆上几个月，然后随着天气的变化又迁移到其它一些地方。