Expressions
In spring, it is warm.在春天，天气暖和。 表示时间的介词有on, in和at。 小练习：连线。 (1) In spring A. it is hot (2) In summer A. it is warm (3) In autumn A. it is cold (4) In winter A. it is cool
(1) B (2) A (3) D (4) C
