价格表达 — 英语选择题
题目
在商店里，小明想买两样东西：一支钢笔（a pen）和一个汉堡（a hamburger）。他问售货员，售货员说：The pen is twelve yuan. The hamburger is fifteen yuan. 小明一共要付多少钱？下列哪句表达是正确的？
A. They're twenty-seven yuan.
B. It's twelve yuan.
C. They're twenty-five yuan.
D. It's fifteen yuan.