Mary ______ come to help us, but nobody is sure.

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

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

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

She began cleaning the wound with ______

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

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

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

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.

The volunteers collect tortoise eggs ______ tortoises form being extinct.

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

Have you seen my ______?

Some of the students began to fall asleep ______.

“Gone With The Wind” ______ since last week.

Our current assignment requires ______ reading.