Read the following article and select the best answer. Article: Over thirty thousand years ago,people from northern Asia went to America.Today, we call these people Indians . The Indians went to America because the weather began to change.Northern Asia became very cold. Everything froze. They had to move or die. How did the first Indians go to America? They walked! Later Columbus found the New World in 1492.At first,only a few Europeans followed .They travelled to America in boats. For the next three hundred years, about 500,000 people went there. Then the number grew very quickly. From 1815 to 1915,over thirty-two million Europeans left their countries and went to the United States. The biggest groups were from Germany and Italy .These Europeans spoke many different languages.Most of them took almost no money.They went to America so that they could find a better life. Question: The first Europeans went to America _ . - by ship - by bike - by boat - by train
by boat

Read the following article and select the best answer. Article: You won't have to look far to find some natural peculiarity for which science sometimes offer a theory. However, many places are complete unimaginable Some places attract people more than others. The incapability to understand the real story behind some of these phenomena draws many people. They are just so mysterious that there is no explaining it. 1.Blood Falls, Antarctica How is it that the coldest and driest place on the planet has a blood-red waterfall pouring down slowly into the McMurdo Dry Valleys, some of the most extreme desert lands on Earth? What causes the mysterious flow was only recently "discovered" in a study. Scientists believed for many years red algae gave the unusual color. But now research has shown that iron oxide is responsible for the hue. The waterfall even contains strange bacterial lifeforms. 2.Magnetic Hill, Moncton, New Brunswick Be very careful if you choose to drive to the bottom of this hill. Stories about what happens there have been around since early 1900s. As impossible as it sounds, your car will start to "roll" uphill. "And it doesn't just work on cars--vans, trucks and even tour buses roll upward in total defiance of natural law," according to Tourism New Brunswick. 3.Racetrack Playa, Death Valley, California Located in a remote valley between the Cottonwood and Last Chance Ranges, Racetrack Playa is a place of really beauty and mystery. The Racetrack is a dry lakebed, best known for its strange moving rocks. It looks like they "sailed" through the valley. Although no one has actually seen the rocks move, the long moving tracks left behind in the mud surface of the Playa prove their activity. The most logical explanation so far is that ice forms covering the stones, causing them to move. Question: What's the distinctive characteristic of Racetrack Playa, Death Valley, California? - The rocks in its valley can turn red. - The rocks in its valley can roll uphill. - The rocks in its valley can change their places. - The rocks in its valley can sing beautiful songs.
The rocks in its valley can change their places.

Read the following article and select the best answer. Article: Why does the Leaning Tower of Pisa in Italy lean? It leans because of a mistake. It has leaned almost since the day the tower was built. In 1173, the people of Pisa, Italy, wanted to build a bell tower. They wanted the tower to be the most beautiful bell tower in all of Italy. The city also needed a bell tower because the church did not have one. However, there was a problem. As soon as the first floor of the building was finished, the tower started to lean. Builders tried to make the building straight again as they added more floors, but they couldn't figure out how to make it stop leaning. It took almost 180 years to finish the tower. Since then, the tower has leaned by another millimeter every year. Today, the Leaning Tower has eight floors and is 54.5 meters tall. By 1990, it was leaning by about 4 meters to one side. It was also slowly sinking into the ground. Many people became worried that it would soon fall apart. In 1998, repair works began on the tower, and by the end of 2001, it had been moved back by 45 centimeters. The tower will still lean, however, so it will need to be repaired again---in another 200 years. Question: why did the people of Pisa want to build the tower? - They needed a new church - They wanted to build the tallest tower in Tower - They needed a bell tower. - They wanted to build a leaning tower.
They needed a bell tower.