Plants and animals require water that are moderately pure, and they cannot survive if water is loaded with toxic chemicals.

In recent years, there have been  great increases in a number of engineers and scientists employed in American industries.

If they ______ down that old opera house, we would not have any historical architecture left in the city.

Physical fitness does not guarantee good health, but they provide a big step toward living a long and healthy life.

She began cleaning the wound with ______

If I ______ the lottery last week, I ______ rich now.

He got divorced, ______ his parents had done years before.

The volunteers collect tortoise eggs ______ tortoises form being extinct.

Water pollution can kill a large number of fish, birds, but other animals; in some cases it may kill all members of a species in an affected area.

Have you seen my ______?

Experts in psychology believe that for many people money is an importance symbol of strength and influence.

“Gone With The Wind” ______ since last week.

Some of the students began to fall asleep ______.

Our current assignment requires ______ reading.