Question

which is the best way to complete the text? before mexican freetail bats migrate to mexico for the ____ can be seen flying out from under austins congress avenue bridge every evening. winter, they winter they winter. they

Explanation:

原句中“for the winter”后需要停顿，且后面新句子首字母大写，所以用“winter. They”合适。

Answer:

winter. They