—All the villagers _____the fight against the big flood, _____young and old, men and women.

— It’s really very brave of them to do so.

A．joined; including

B．joined in; included

C．joined in; including

D．joined; included

西北地区主要的气候特征是（　　）

A．属于亚热带季风气候

B．干旱

C．降水多集中在春季

D．夏季高温多雨