formal ·adjective (CORRECT)
Definition: describes language, clothes and behavior that are traditional and correct Level: B2
公司正在举办一个正式的晚宴来庆祝周年纪念。
The company is hosting a ___formal dinner party to celebrate the anniversary.
商务会议通常要求正装，比如西装和领带。
Business meetings usually require ___formal attire, such as a suit and tie.
对于这个随意的聚会来说，他的演讲太过正式，让每个人都感到有些拘束。
His speech was too ___formal for the casual gathering, making everyone feel a bit stiff.