问题补充：
- _ __. -I want a white hat.
A. How much is a hat?
B. Can I help you?
C. Do you have a hat?
D. What do you want to buy?
答案：
(答案→)A. How much is a hat?
B. Can I help you?
C. Do you have a hat?
D. What do you want to buy?
解析：
试题分析: 句意：你想要什么？我想要一个白帽子。 How much is a hat?一顶帽子多少钱？Can I help you?我能帮助你吗？ Do you have a hat?你想要一顶帽子吗？ What do you want to buy?你想要什么？根据I want a whtie hat,我想要一顶白帽子，可知问的想要什么，故选D.
