使用非处方药专有标识时，可以单色印刷的是（）
A.乙类非处方药的包装
B.内包装和外包装
C.标签和使用说明书
D.使用说明书和大包装
参考答案：D
-Excuse me. Could you tell me _____?
-Yes. There is a video shop on River Road.[ ]
A. where can I buy some CDs
B. when I can buy some CDs
C. when can I buy some CDs
D. where I can buy some CDs
