You don’t have to know the name of the author to find a book. You______find the book by the title.
Martin’s gone to ______ the children from school.
______ the ______ of buying a house, it costs little to rent a house.
The volunteers try to convince people _____ the fact that some species are in danger of _____.
Across the river _____.
_____ all the demands had been refused _____ to go on strike.