Hardly anything ______ more than the happiness of seeing someone using his device for treatment.

单项选择题A．Sorry, the number is engaged. Will you hold onB．Yes, speaking.C．Hello. Who are you, pleaseD．Hello. Thank you for calling.

单项选择题I’d like to go with you.[B] No problem.[C] Sorry. I’m busy now. Go away.[D] Of course. Go down this street and turn left.