Question

Here is a ticket to the movie for you.You are____(luck).填什么?

Answer 1

lucky.lucky是形容词,you are lucky 能够成主系表结构,luck是名词,不能做表语（也就是be后边的成分）,形容词才可以作表语.这句话的意思是“你很幸运.这有张电影票给你”