I _____ the film last night because I _____ it several times before.

Because the tachinid fly is a parasite of harmful insects, much species have been imported into United States to combat insect pests

Not one in one hundred children exposed to the disease are likely to develop symptoms it.

I was _____ in a month in autumn 20 years ago. 

It was near end of prehistoric times thatfirst wheeled vehicles appeared.

He seldom goes to the library, ______?

You wanted me to tell you about what I was doing here and how waslife 

As a poetry, Nikki Giovanni makes effective use jazz and blues rhythms.

The steam engine is usually thought of as a relative modern invention, but the Greeks built kind of steam engine ancient times

About 200 million years before, all the continents were part of vast land mass called Pangaea.

Geologists find it useful to identification fossils inrock sample because certain assemblages of species are characteristic of specific geologic time periods.

In that age of computers, it is difficult to imagine how tedious work of accountants and clerks must have been in the past.

For thousands of years, people have used some kind of refrigeration cooling beverages and preserve edibles.

At the awards banquet, philanthropist was recognized for his generosity and careful in aiding the poor

I like the village _________ I used to live.

How much times did Rick and Jennifer have to do the experiment before they obtained  results they had been expecting?

A fragrant plant has tiny sacs that makes and stores the substances that give it pleasant odor.

This floor doesn’t need no more wax; there’s plenty already.

No matter how she tries, she never _____ over her shyness. 

Do you think that  the humans will ever be able to live in other planets?

Because not food is as nutritious for a baby as its mother’s milk, many women are returning practice of breast feeding.