_______ on the American Civil War, the book attracted a large number of readers when it was published.
________to attract young readers, the book is full of interesting stories and features simple language.
________is a pity that you forgot both her address and her telephone number.
What time is it now? My watch is________.
Twofifths of the highway________so far.
I think whoever makes________contributions to the company than others should get________ income.