As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.

The girl seems to have a ________for drawing.

The young man works very hard from a(n) _____to become rich.

The small grocer was at the ______ of the people he owed money to.

In 21st century universities in the US, there is little room for traditional literature because students feel a lot of         to study science.