Choose the word that has main stress placed differently from the others.

A.floppy    
B.embrace 
C.cotton      
D.idol

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Read the passage carefully, then choose the best answer for each question.
HAVE ALIENS VISITED US?
Many people have stories about seeing aliens. Here are two.
Judy Varns works for a group called the Mutual UFO Network. The purpose of this group is to research UFO sightings. Varns thinks a place called Area 51, in Nevada in the U.S., may be the best place on Earth to see UFOs. One day, she took some photos in the area and saw something she thinks is a UFO. "We saw this little disk-shaped thing in our photos. It's kind of exciting," she says.
Pat Travis lives near Area 51. One night, she saw a strange light in the sky. The light's movements were very unusual. Travis saw the lights move sideways and up and down. She saw them make many strange moves. Travis thinks it was a UFO.
Secrets of Area 51
Some people think Area 51 is where the U.S. Air Force keeps secrets, like UFOs that came to Earth and the aliens inside them. But really, Area 51 is a place the U.S. Air Force uses to test new technology, such as new kinds of aircraft.
James McGaha is a pilot who flew airplanes at Area 51. "There is absolutely no UFO activity at Area 51," he says. "No flying saucers, no live aliens, no dead aliens."
So what did Varns and Travis see? Bill Fox worked at Area 51, too. He thinks he knows the answer. "We did build some strange-looking airplanes," he says. "I could see why some people would think they were UFOs."
So are UFOs real? You'll have to decide for yourself. But if you do visit Nevada, keep your eyes on the skies!
What does “I could see why some people would think they were UFOs” mean?
A.I agree with people who believe in UFOs.
B.I saw UFOs near Area 51 with my own eyes.
C.I understand why some people think they saw UFOs.
D.I claim that UFOs are real because many people have seen them.

Read the passage carefully, then choose the best answer for each question.
THE HISTORY OF PIZZA
Today, pizza is one of the world's favorite foods. All over the world, people make different pizzas, with different ingredients. But where does pizza come from? And who made the first one?
The First Pizza
People have been making pizza for a very long time. In the Stone Age, some people mixed flour with water to make dough. Then they cooked it on hot rocks. Over time, people started using the cooked dough as a plate, covering it with various other foods, herbs, and spices. They had made the world's first pizza.
A New Ingredient
Then—in the early 1500s—European explorers brought the first tomatoes back from the Americas. Tomatoes are a basic ingredient in many pizzas today. At first, however, most Europeans thought eating tomatoes would make them sick. So, for about 200 years, few people ate them.
Slowly, people learned that tomatoes were safe to eat, as well as tasty. In the early 19th century, cooks in Naples, Italy, started the tradition of putting tomatoes on baking dough. The flat bread soon became a favorite food for poor people all over Naples. In 1830, a cook in Naples took another big step in the history of pizza—he opened the world's first pizza restaurant.
A World Food
Today, about five billion pizzas are made every year around the world. In the U.S. alone, people eat about 350 slices every second! People may not know it, but every piece is a slice of history.
What does people started using the cooked dough as a plate mean?
A.People put other foods on top of the dough.
B.People cooked the pizza dough on hot rocks.
C.People used the same pizza dough again and again.
D.People cooked the pizza dough on a plate.

Read the passage carefully, then choose the best answer for each question.
TRAINING GRIZZLIES
Russell Chadwick remembers the summer he turned 16. It was the summer he wrestled with grizzly bears!
It all started when Russell worked as an animal trainer at Wasatch Rocky Mountain Wildlife. Wasatch Wildlife is an animal-training center in Utah, in the U.S. At the center, Doug and Lynne Seus train animals to be actors.
Doug and Lynne asked Russell to help take care of two four-month-old grizzly bear cubs named Little Bart and Honey Bump. That's more difficult than it sounds. Baby bears are big!
Russell's job was to play with the bears. This teaches them to be comfortable with humans. Playing with the bears was fun, but Russell had to remember that bears are wild animals.
"One time, Honey Bump took a bite out of my back, and I had to wrestle her to the ground. But it also showed me how smart  she is. She knew she had done something wrong and 'apologized' by putting her head in my lap."
Russell found that bears can understand more than just "sit" and "stay." For example, when Russell said "Peekaboo!" to one baby bear, he covered his eyes with his paws, just like a human child.
Russell didn't get much money for doing this job. But he enjoyed the experience. He also learned a lot from it. When you've wrestled with a grizzly bear, things like work and exams don't seem so difficult anymore!
Which of these sentences about Doug and Lynne Seus is NOT true?
A.They are movie actors.
B.They are animal trainers.
C.They work at Wasatch Rocky Mountain Wildlife.
D.They asked Russell to help take care of two bears.

Read the passage carefully, then choose the best answer for each question.
I’VE FOUND THE TITANIC!
As a boy, Robert Ballard liked to read about shipwrecks. He read a lot about the Titanic. "My lifelong dream was to find this great ship," he says.
On August 31, 1985, Ballard's dream came true. He found the wreck of the Titanic. The ship was in two main parts lying four kilometers (2.4 miles) under the sea. Using video cameras and an undersea robot, Ballard looked around the ship. He found many items that told the sad story of the Titanic's end. For example, he found a child's shoes, a reminder of the many deaths that happened that night in 1912.
In 1986, Ballard visited the Titanic again. This time, he reached the ship in a small submarine. A deep-sea robot—a "swimming eyeball"—took photos inside the ship. When other people saw the photos, they wanted to visit the ship, too.
When Ballard returned in 2004, he found the Titanic in very bad condition. Other explorers had taken away about 6,000 items, like clothes, dishes, and shoes. Some even took pieces of the ship. They think these things should be moved to a safer place, but Ballard doesn't agree.
Ballard believes that taking things from the Titanic is like robbing a grave.  Instead, he wants to put lights and cameras on and around the shipwreck. This way, people can see the great shipwreck and remember what happened to it. “As long as she needs protection,''  says Ballard, "the Titanic will always be part of my life."
What does “they” refer to?
A.Robert Ballard and his team
B.other visitors to the Titanic shipwreck
C.people from the Titanic who are still alive
D.pieces of the ship