Article: Dozens of dolphins swam out of the polluted waters of Haifa Harbor on Tuesday.This was the first time that dolphins had visited this crowded Mediterranean port,and researchers were surprised and delighted by the unexpected event. Between 40 and 50 of the dolphins appeared in the busy port on Tuesday morning,obviously drawn by the fishrich waters of Haifa Harbor. However,the bay is also full of harmful chemicals. Aviad Sheinin,professor of Haifa University's Maritime Studies Department,said he didn't think the dolphins were harmed by the pollution,but he hoped that they would swim back to the sea soon. "It seems that they are quite relaxed. They don't seem to be stressed," he said. Haifa Harbor is lined by chemical companies that have been pouring poisonous waste into the water for decades. While pollution levels have dropped in recent years,the water is still considered a health hazard. "There are lots of fish in Haifa Harbor. Unfortunately we couldn't tell the dolphins that the fish are not healthy;and I don't know what the result will be," he told Israel Army Radio.Hundreds of Haifa residents gathered around Haifa Harbor to see the interesting sight,and researchers said this provided a rare chance to film and study the roughtoothed dolphins. In addition to the dozens of dolphins which swam into the port on Tuesday,a similar number stayed outside the breakwater .Later Tuesday the dolphins left the port but remained near the entrance and Israel's coast guard was patrolling the area to try to make sure the dolphins didn't reenter the poisonous waters. Relatively little is known about roughtoothed dolphins,which are usually found in deep and warm tropical waters. Question: This passage mainly tells us that _ . Yes or no, is the answer "dolphins made a surprise visit to the polluted harbor"?
Yes

Article: Have you ever seen people dance? Some dances are fast and others are slow. People's feet always move when they dance. They keep on moving until the music stops. People have enjoyed dancing for a very long time. This story is of a different kind of dance. It is a dance without people or music. Yet this dance is one of the oldest in the world. It is the dance of bees. If you have ever watched bees, you know that they are very clever. They also work hard looking for food and bringing it back to their home. The home of the bees is called a bee hive. Here hundreds even thousand of bees live. They work day and night building small walls. There they make their honey. This is the same honey that we eat. Where does the honey come from? Bees live on food from flowers. Have you seen bees flying around a flower garden? When a bee rests on a flower, it tries to go to the centre of it. There it takes in as much food as its body can hold. Then it flies to take the food back to the hive. At the hive, bees change flower food into honey. Then they fly away for more food. How do the bees know where to find the best food in the sweetest flowers? One bee acts as a guide. When it discovers good flowers, it flies back to the hive and tells the others. It does this by dancing for them. The bee dances on one side. This tells the other bees which way to go to find the flowers. But that is not all. The bee dances for some time. And the length of its dance tells the other bees how far they must fly to reach the flowers. When the bees see the dance, they know where the flowers are. They fly away and return with more food for the hive. Sometimes we hear the music of the bees as they fly around. But few people have ever seen them dance. Yet without that dance we might never have sweet honey to eat. Question: The writer believes that _ . Yes or no, is the answer "bees dance more often than people"?
No

*Question*
Article: Jacob's Pillow Dance Festival Where: Becket, Massachusetts When: Jun.15---Aug.24 Each summer, this influential dance center presents a number of classes and performances by more than 50 companies from around the world. Highlights in this season include the Dance Theater of Harlem's production of Alvin Ailey's "The Lark Ascending", which opens the festival. Many events are free. Ticketed performances start at $22. Jacobspillow.org. Moab Music Festival Where: Moab, Utah When: Aug.29---Sept.9 This area is better known for mountain biking than for music . But since 1992, it has hosted a private festival that brings classical, jazz, Latin and other types of music to the land. This year there will be 16 concerts, including three "Grotto Concerts", where guests take a 45-minute boat ride down the Colorado River to performances. Events start at $25. Moabmusicfest.org. Cheyenne Frontier Days Where: Cheyenne, Wyoming When: July19---28 There is something for everyone at this 117-year-old festival, from an "Indian village" and Old West museum to country concerts. But the competition is still the main attraction, with cowboys and cowgirls competing for major money in the world's largest outdoor stage. Competition tickets start at $18, and concert tickets at $23. Cfdrodeo.com. The Glimmerglass Festival Where: Cooperstown, New York When: July6---Aug.24 Each summer, opera lovers from around the country (and the world) travel to upstate New York to watch productions that include stars like Nathan Gunn and Ginger Costa-Jackson. This year's performances include Wagner's "The Flying Dutchman" and Verdi's "King for a Day", in honor of the 200th birthdays of both composers. Tickets start at $26. Glimmerglass.org. Question: If you want to enjoy a "Grotto Concert", which date suits you best? Yes or no, is the answer "September 4."?
**Answer**
No