黄河进入下游平原地区，河道变宽，坡度变缓。河水减慢，携带的泥沙沉积下来，使河床抬高，成为____ 。
The Greens ________live in the south of Asia . They don't want to move to the north because they ________ the cold weather.
Listening is just as ______ as speaking in language learning.
