补全对话。 Wendy: Oh Mary, what are you doing? Mary: I'm __ 1 __ as a ghost. Wendy: Do you want to __ 2 __ Halloween? Mary: Yes, I do. Wendy: It's a festival in the west. My favourite festival is __ 3 __. I like eating rice dumplings and other nice food. Mary: __ 4 __ is it? Wendy: It usually comes in June or July. It is very __ 5 __ (有趣的).