关于3L和新概念的问题——请问关于频率的词（sometimes、often、always等）出现在哪一册的哪一课啊?

题目

关于3L和新概念的问题——请问关于频率的词（sometimes、often、always等）出现在哪一册的哪一课啊?
3L是look listen and learn

答案

新概念第一册 第51课
节选：
It's often windy in March.
It's always warm in April
and May,
but it rains sometimes.
HANS:What's it like in summer?
DIMITRI:It's always hot
in June,July and August.
The sun shines every day.