.There ______a number of books in our school library. The number of books________getting larger than last year.
--What did Sam say just now?--He said he ______ at that time.
-- My friends always get better grades than I do. What should I do?--
______ Kathy was watching TV, her mother asked her to go shopping.
If there are _______ people driving, there will be ______ air pollution.
There ________ no good news for you today.