— Do you happen to have twenty dollars with you? 

— ________? 

— I want to buy a dictionary.

[    ]

A. What for   B. When can you pay me back

C. How much   D. How do you know

─ Do you happen to have twenty dollars with you?

─ ________?

─ I want to buy a dictionary

[　　]

A． What for　　　　B． When can you pay me back

C． How much　　　D． How do you know