Swimming is p____ in all countries with the sea and in those with many rivers.
问题描述：
Swimming is p____ in all countries with the sea and in those with many rivers.
答
Swimming is popular____ in all countries with the sea and in those with many rivers.
游泳是在所有有海洋和有许多河流的国家是非常流行的!
仅供参考 :-D