_____is the population of the city?
What those businessmen concern about primarily is whether they can ______ as much as possible from the project.
An idea suddenly came to J.K. Rolling ________ she could write a book about people living in the magic world.
Andy and Ben both study ________ but they hold opposite ________ views.
China has long been a leader in the field of genetic research ________ improving agriculture.
You lent him $10,000 yesterday? You must ________ by him!