Article: The earth is 4 600 million years old. We humans have lived on earth for only 35 000 years, but during this period we have changed our planet a lot in many ways. Some things we've done are very good for the earth while some are bad. All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so more and more sorts of animals and plants are disappearing. In big cities, cars and buses have polluted the air. Many people in cities now have health problems. Factories have also polluted the land and the water. As a result, many rivers and lakes are now dead. Around the earth, there's a special kind of oxygen called "ozone"(O3). It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind of radiation can cause cancer. Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a "blanket" around the earth. The heat from the sun can't escape so the temperature is rising. This is called "the greenhouse effect". It causes the level of the oceans to rise and the climate of the earth to change. All these problems are very serious, so we must do something now. ,A, B, C, D. Question: The level of the oceans is rising because of _ . Yes or no, is the answer "the greenhouse effect"?
No

Article: Mary had a nice summer vacation last year. She went to Hawaii in July. Mary likes fruits, and the Hawaiian bananas and oranges were great. The weather was very fine, but sometimes it rained heavily. On Monday she went to the museum. It was an interesting place and not very crowded . On Tuesday she went to the mountains. On Wednesday she visited an old friend. They went to the movies in the evening. The movie was so funny that they laughed again and again. On vacation she felt like she she was a flying bird! The vacation cost her about 600 dollars, but Mary had a fun time. Question: Why did Mary laugh when they saw the movie in that evening? Yes or no, is the answer "Because the movie was very interesting."?
No

Article: My name is Jenny . I have a sister and a brother, Rose and Paul. We like apples very much. Rose and I like hamburgers. But I don't like salad. Paul doesn't like broccoli. But Rose does. My parents like tomatoes and French fries. Question: My parents have _ sons and _ daughter(s). Yes or no, is the answer "one; two"?
No

Article: Hello! I'm Tom. This is a pencil box. It's orange. It's my pencil box. What's in the pencil box? A ruler is in the pencil box. It's my ruler. The ruler is blue and red. That is a pencil in my pencil box. It's black and white. It is not my pencil. Look! That girl is Lucy. It is her pencil. I find a green pen in the pencil box, too. It's Tim's. I call Tim at 759-631. It is his telephone number. Question: What is blue and red? Yes or no, is the answer "The ruler"?
Yes