She is going to buy _a_postcard_____.(划线提问) She is going to_buy_a_postcard___.(划线提问)
She is going to buy _a_postcard_____.(划线提问)
She is going to_buy_a_postcard___.(划线提问)
注意，上面两题不是一样的，第一题划线的是“a postcard”，第二题是“buy a postcard”。