—What is the man, do you know?-— I don’t know exactly． But I think he can be ______ but a teacher．

--There is still a copy of the book in the library. Will you go and borrow _____? --I’d rather buy _____ in the book store.

 —Did ________ of your parents come to attend the opening ceremony? — ________ of them came. 

Life in the city is quite different from _____ in the countyside.

I’ll spend half of my holiday practicing English and ________ half learning            drawing.