填空
--_____ balloon, Mr Li?
--No, thank you.
--____ apple, John?
补全对话
--A balloon, Alice?
--No, _____ _____.
--A cake, Ben?
--Yes, please.
-- _____ you _____.
--Thank you.
--___ ___ a bag?
--No, it isn't.
--What ___ ___?
--It's a dog.
看图填写单词
a ______
an ______
two ______
a _____