问题：
— Bob, can you spare me a few minutes right now? I have to ask you some questions.
— ________.
[ ]
A. It"s a pleasure
B. Ask, please
C. Help yourself
D. Yes, go ahead
— Bob, can you spare me a few minutes right now? I have to ask you some questions.
— ________.
B. Ask, please
C. Help yourself
D. Yes, go ahead
— ________.
[ ]
A. It"s a pleasure B. Ask, please
C. Help yourself
D. Yes, go ahead
参考答案：