---Which classmate is the best friend of_________?
---I think Helen is.
---Would you like some more noodles?
---1've had enough. ________.
---Can you speak English?
---Sorry, I ________.
---Could you tell me _________ answer to this question?
---I can't work it out.
---What colour do you like better, black or white?
---I like ________ but red.
---What'sin the glass?
---There'ssome __________.
---Amy isn't going out this evening, is she?
---________.She has to stay at home to look after her sick mother.
---Listen! Is Professor Bloom giving a speech in class?
---No, it ________ be him. He has gone to France.