He is jealous ________ his rival’s success. 

When a pearl is cut in half and examined under microscope, but its layers can be seen

Interestingly, the United States both produces or uses more crude oil than any other national

Smoking cause millions of early deaths of the world every year

They are going to have to leave soon, and so do we.

The amount of books the Library of Congress is more than 58 million volumes.

It was her who suggested that he should go to New York order to get a direct flight.

If it is kept dry, a seed still sprout up to forty years after their formation.

So  when Whitman returned to the Pacific , overs thousand settlers went with him.

Many people go to the pagoda to ............... for a happy year for themselves and their family.

In some species of fish, such the three-spined stickleback, the male, not the female, performs a task of caring for the young.

Banh Chung is made ............. sticky rice, green beans and fatty pork.

When Cliff was sick with the flu, his mother made him to eat chicken soup and rest in b

You’ll find that this tool is very useful ________ many different things. 

The Aardvark is a mammal that burrows into the ground to catchesants and termit

It was Mary Anderson, an amateur invention, who first patented windshield wipers for automobiles

Can I borrow your scissors? Mine …….not sharp enough. 

A thunder usual follows lightning by five seconds for every mile between the flash and observer

Usually the climate mountainous areas becomes much windy at higher altitude

The government’s budget maybe considered balanced when the amount of money spends does not exceed the amount it receive

The extraordinary beautiful of orchids makes them the basis  of a multimillion-dollar floral industri.