根据对话情景,填入恰当的单词,每空一词. A;Hi,Joy,What are you doing? B:I am 1.___________ a picture. A:How long have you 2._____________ drawing? B:I have been drawing 3.___________ I was six years old. A:You mean you began to draw seven yeras 4.__________________. B:Yes,you're right. A:Are you 5.___________ in drawing B:Yes I like it very much.