1. The word 活动 in Chinese has a more broad meaning than its English equivalent. Sales are considered to be a type of 活动, as seen in 这附近的一家百货公司从今天开始有一个特价的活动 and 通常一家商店有特价活动的时候,他们会希望很多客人去跟他们买东西.
2. 才 is used to contradict the other speaker in 才不是这样.
3. Jokes in Chinese that aren’t funny are considered to be “cold” as in 你说的话很冷.