It’s very kind ______ you to show me the way.
— Can you play chess?— No, but I can play ________ piano very well.
—Would you like to join us in the game ?— , but I have to help my mum.
— Would you like something to drink?— I’m not thirsty.
—Have you mended your shoes, Bob?—Yes, I _________ them twenty minutes ago .
—Listen! Is Mary singing in the next room?—No. It _______ be Mary.She has gone to Shanghai for an important meeting.