If a driver is using a manual transmission and shifting hundreds or even thousands of times during a race, there is added strain. All of this is happening as the cockpit temperature rises to 140 degrees. Then there is the emotional pressure of trying to go faster than many other fast cars. Racecar drivers must be well-conditioned, especially if they are really planning to win.

Racing cars is ________.

Susie was the youngest in her family. She had warm brown eyes, a sunny smile, heavy long black hair, and big ideas. She followed her sisters as they helped their mother. She swept the wooden floor clean, down to the cracks, with a stick broom that was as tall as she was. She learned how to plant corn and beans and melons, and how to harvest them when the honking geese swept southward across the sky. She learned how to mic pemmican, a food made of meat and fat, and stood on tiptoes to taste the sweet golden pies her mother made out of squash.

Susie was ________.

A bag of dirt, Keith says, “can tell us more about the web of life in this region that can one single dinosaur bone. We can find out what else lived here, what grew here, what animals ate them. And it’s faster than crawling around sniffing dirt.”

The dirt can be ________.

He never knew exactly what it was that woke him. When, through the confusion of half-dreams and imagined noises, he realized that he was awake, the room was quite dark. There was no sound but the constant murmur of the sea, very faint on this side of the house but always in the air. But from the way all his senses were straining to catch something, he knew that a part of him which had not quite gone to sleep at all was warning him of some danger very near. He lay very still, but he could hear nothing. Then there was a very faint creak behind him, from the direction of the door.

He was ________.

Raul heard his teacher talking. But he was not really listening. He was thinking about what he had to do. And he was thinking that he could not do it.

Raul was ________.

Lionfish have red and white stripes. They are beautiful. They are also dangerous. They have 18 needle-like fins. The fins can sting. They keep other animals from getting too close.

They help keep the fish ________.

Seven thousand cases had been reported. Great care had been taken to keep flu germs outside the house. The doctor’s helpers, who were friends of the family, had bustled about in spotless clothing. They had worked hard, trying to make the mother, Alberta King, comfortable.

They were ________.

Here comes the freight train. We watch as we wait. The engine is first, so bold and so strong. It pulls all the cars that follow along. Hello, freight train! Here comes a flat car, a hopper, a rack car. Here comes a boxcar, and a big piggyback car. Cars with chickens, cows, and hogs, cars with lumber, coal, and logs. Tank cars for gas. Tank cars for oil.

The train ________.

Older clocks have two hands. Each hand is a different size. Each point at a number. The numbers tell the time. Inside the clock there are wheels. The wheels help turn the hands.

Old clocks have ________ parts.