ne more favor, please—____ , sir. What’s it then

Would you like to play _______chess with me——Yes, I’d like to, but I have to play _____piano with Lily this afternoon.

下列交际用语使用得体的一句是（ ）

This painting is so valuable that it is rather difficult to calculate _______ its price would be if the museum _______ to sell it.

What impressed me most was the quotation(引言) from Shakespeare with which he ­­_______ his inspiring speech.