Internet reports of whales sounding like people are not new. But in this case in San Diego, California, scientists for the first time recorded the utterances, did an acoustic analysis and were surprised to find a rhythm similar to that of human speech, Sam Ridgway of the National Marine Mammal Foundation reported on Monday. The sounds marking is quite special : Whales make sounds through the system of the nose, unlike people, who use their throat. So this particular with whale had to make some tricky muscular and blowhole adjustments. "Such obvious effort suggests motivation for relatin", said Ridway, the main author of a study featured in the journal Current Biology. "The sounds we heard were clearly an example of vocal learning by the white whale." The wale, named Noc, died five years ago. Ridgway says that back in 1984, he and others started hearing sounds near the whale and dolphin enclosure that recalled two people speaking in the distance, too far away to be understood. The sounds were later traced to one particular white whale when a diver in its tank came to the surface because he thought he heard colleagues tell him to do so. Noc had lived among dolphins and other white whales and had often been in the presence of humans. The whale made human-like sounds for around four years until it reached the age of sexual maturity, Ridgway said. What would be the best title for the text? A) The Whales and the Dolphins in the Pool B) Human Voice and Whale Sound C) Whales Making Human-like Sounds D) The Harmony between Humans Whales
C
The sea is very big. When you look at the map of the world, you will find there is more water than land. The sea covers three quarters of the world. It looks very pretty when the sun is shining on it. It can be very rough when there is a big wind. The sea is also very deep in some places. Some parts of the sea are very shallow. But in some places the depth of the sea is very great. There is one spot, near Japan, where the sea is nearly 11 kilometers deep! The highest mountain in the world is about 9 kilometers high. If that mountain were put into the sea at that place, there would be 2 kilometers of water above it! The sea is salty. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are more salty than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers can't sink! Fish can't live in the Dead Sea! The sea can be very cold. Divers, who go deep down in the sea, know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship! They went down to a depth of eleven kilometers. Why can't people go very deep into the sea? A) Because of the coldness of the water. B) Because of the living things in the sea. C) Because of the pressure of the water. D) Because of the salt in the sea.
C
Q: In America, after middle school comes high school, which includes grades 9 through 12. Students are required to take compulsory subjects like English, social studies, math, science, and physical education. In addition, they choose among elective subjects to complete their high school education. Electives include subjects in technology, music, art, and foreign languages. Each student in the school has their own locker for books and personal items. This convenience saves students from carrying textbooks, and allows students a small space they can decorate with(......)posters and favorite objects. Cheating in any form is strictly prohibited in American schools. And in fact, high school students usually don't cheat. If they are caught cheating, they will have to face severe punishment. Each school holds certain yearly activities for all school students, such as homecoming , prom night , holiday celebrations, etc. Most high schools have at least one sports team that competes in local games, and all students are encouraged to take part in athletics. Schools often offer football, baseball and softball, basketball, volleyball, tennis, and soccer. Some may even have sports like golf, swimming, gymnastics and cross-country skiing. Many high school students have part-time jobs by the age of 15 or 16, some even earlier. Their first jobs are often babysitting or cutting lawns , but later they will likely get a job at a fast-food restaurant, video store, or clothing shop. Sixteen years old is legal driving age in most states, and students usually want to own a car as soon as they can. Some parents allow their children to drive a family car, and may even buy a car as a graduation present. Others prefer that their sons and daughters earn enough to buy a used car. Many teenagers feel it's necessary to own a car, and will do whatever it takes to be able to drive. Which is the best title of this passage? A) How American Students Study. B) American High School Life C) The Life of American Students. D) Introduction to American School.
A: B
(Q).
Grey clouds move as low as smoke over the treetops at Lolo Pass. The ground is white. The day is June 10.It has been snowing for the past four days in the Bitterroot Mountains.Wayne Fairchild is getting worried about our trek over the Lolo Trail-95 miles from Lolo Montana to Weippe in Idaho, across the roughest country in the West. Lewis and Clark were nearly defeated 200 years ago by snowstorms on the Lolo.Today Fairchild is nervously checking the weather reports.He has agreed to take me across the toughest,middle section of the trail. When Lewis climbed on top of Lemhi Pass,140 miles south of Missoula,on Aug.12,1805,he was astonished by what was in front of him;"high mountain chains still to the West of us with their tops partially covered with snow."Nobody in what was then the US knew the Rocky Mountains existed,with peaks twice as high as anything in the Appalachians back East. Today their pathway through those mountains holds more attraction than any other ground over which they traveled,for its raw wilderness is an evidence to the character of two cultures:the explorers who braved its hardships and the Native Americans who prize and conserve the path as a sacred gift. It remains today the same condition as when Lewis and Clark walked it. The Lolo is passable only from July to mid-September.Our luck is holding with the weather,although the snow keeps getting deeper.As we climb to Indian Post Office,the highest point on the trail at 7,033 ft,we have covered 13 miles in soft snow,and we hardly have enough energy to make dinner.After a meal of chicken,I sit on a rock on top of the ridge .There is no light visible in any direction,not even another campfire.For four days we do not see another human being.We are occupied with the things that mix fear with joy.In our imagination we have finally caught up with Lewis and Clark. We learn from the text that before 1805 _ . A) The Rocky Mountains were wholly covered with snow B) there were no people living in the western part of America C) no Americans knew of the existence of the Rocky Mountains D) the Appalachians were the western frontier of the United States
(A).
C