Officers who join mounted units attend training courses. Some units have their own training programs. Others send officers to

private training schools. Most training programs last one to two weeks. Officers also receive training on the job.

There are many things for them to _____ .

Concentration leads to better work. For example, an office worker listens to the radio while typing a memo. This keeps the worker

from concentrating. The worker makes several errors and must retype the memo. The worker turns the radio off. The worker can

concentrate better on typing the memo when the radio is off.

_____ helps the worker concentrate.

The Bengal tiger is the national animal of India. Most tigers are brown, orange, and black. Some Bengal tigers are white with black

stripes.

Bengal tigers can look _____ .

She nibbled around her thumb, thinking. What would she do all summer? Jobs at the mall would be taken already. She didn't want

to go to summer school and she didn't want to just hang out all day.

She was trying to make _____ .

Keoni Van, 14, loves surfing in the ocean. He practices every week. He also competes in surfing contests. Keoni lives in Tahiti. It is

an island in the Pacific Ocean. People there have been surfing for hundreds of years. "It is part of our culture," Keoni says proudly.

Someday, Keoni wants to become a professional surfer.

Keoni has one main _____

Kate put on dry clothes and went back to the window. The rain had not let up. The flood water was coming closer to the house.

When lightning flashed, Kate could see the shining railroad tracks.

Kate watched the _____ .

Cooperative ownership combines the advantages of home ownership with the convenience of apartment living. Under the

cooperative form of ownership, an apartment building is managed and run as a corporation. The buyer purchases stock in the

corporation that runs the building and, thereby, receives an apartment. The value of the apartment determines the amount of stock

purchased. The buyer receives a lease that grants them exclusive right to possession of the apartment.

It is meant to be a _____ arrangement.

The sight and sound of huge bubbles rising in glass columns set the underwater mood in the lobby of the National Aquarium. In

central space, daylight fades, giving the feeling of a descent into the ocean depths. The lighted exhibits glow in the darkness. The

recorded sounds of ocean waves, seagulls, and distant foghorns can be heard as beluga whales swim in the open pool.

The aquarium provides a _____ atmosphere.

On winning the job, Rutherford dissolved his ties to his law firm. He was satisfied that the $3,500 annual salary as city solicitor

would provide a comfortable living. This sort of behavior set a high standard for ethics that Rutherford would maintain throughout his

political career.

He was _____ .

Don't worry—you could easily outrun a snake. Snakes don't move very fast and they get tired quickly. The fastest ones can slither

along at about the same speed as a person walking, but they cannot keep up the pace for more than a few minutes.

Snakes are _____ .

A gloomy breakfast was eaten, and the four remaining dogs were harnessed to the sled. The day was a repetition of the days that

had gone before. The men toiled without speech across the face of the frozen world. The silence was unbroken save by the cries of

their pursuers, that, unseen, hung upon their rear. With the coming of night in mid-afternoon, the cries sounded closer as the

pursuers drew in according to their custom; and the dogs grew excited and frightened, and were guilty of panics that tangled the

traces and further depressed the two men.

It was a _____ journey.

One fascinating animal that can be found only on Murre Island is the Rapul bat. Many of these long-eared, pale-gray bats live in the

caves on Mount Rapul. After dark, they can be seen picking insects from bark and leaves.

These bats are _____

At first, she thought she was mistaken. How could that passenger be sitting in the first-class dining salon? But as she continued to

look, she knew there was no mistaking those finely chiseled cheekbones. He was still in need of a haircut, and although he had

changed into a dinner jacket, he was wearing it over a white turtleneck sweater, the only man in the entire room dressed so

informally. He probably didn't know any better.

The man was _____

About 25 million people visit the National Mall each year. Its nickname is "America's front yard." People gather there to hear

speeches and to celebrate holidays like the Fourth of July. Memorials to Presidents, like Abraham Lincoln and George Washington,

and to U.S. war veterans surround the giant lawn. Many famous museums are there too. The park is two miles long. That's about as

long as 30 football fields!

The National Mall honors U.S. _____ .

I took the stomach medicine as soon as I got home. It was some syrupy stuff that tasted like mouthwash. It worked, though. By the

time Mother had lunch and was ready to go grocery shopping, the rolling, pukey feeling had disappeared.

Abraham Lincoln's family used candles to light the cabin. It had only one window to let in sunlight. Abe practiced writing letters with

a stick on the dirt floor. Abe wore a hat made of raccoon fur in the winter. Abe's friends played a game called cup and ball.

Abe's home was _____

Her bright smile was like the sun. Men and women alike greeted her warmly as she slipped out of her coat. She stamped the snow

off her boots before she pulled them off. Her cheeks were a deep pink from the cold outside. She was wearing beautiful clothes that

were a lighter shade of pink. They looked as if they had cost a lot.

She was _____

In 1947, Jackie Robinson began playing for the Brooklyn Dodgers. He was the first black player in the major leagues. Robinson

knew that it would be tough. Many people, even some of his own teammates, were angry to see a black man on the team. But

Robinson ignored the attacks and played his best. He knew that was the only way for him (and future black players) to be accepted.

His very first year, Robinson scored 125 runs. He had the most stolen bases in the National League—29. He was named Rookie of

the Year. This award goes to the best new player each year.

Robinson _____ in his sport.

It took six years to build this beautiful arena. It was started in 1729 and was finished in 1735. Large, fancy light fixtures made of

crystal hang from the high ceiling. The balconies have gold and ivory decorations.

The arena is _____

Lipizzaners give us a unique glimpse back in time. They are a link to the days when the world revolved around horses.

They help us _____ the past.