In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

[Q]: Article: Several years ago I worked in an office, which had a locust tree growing outside the window. It had grown into a tall tree and must have been there for a long time. The tree blocked the view and made the office seem dull, unfortunately this happened to be the room assigned to me and I was depressed by it for quite some time. When the first spring came, everything was green except the locust tree. Secretly, I was very happy because I had thought it had died. One morning when I opened the window for fresh air, I unexpectedly smelt a familiar sweet scent floating into my office but I couldn't name it. Suddenly, I realized it was the locust tree! The tree that I thought dead was blossoming in full glory. From then on, I usually came to the office very early to see dew forming on the locust tree blossoms and every year was eager to see spring again. During summer, the green leaves provided shade protecting me from the harsh sunlight, but allowing enough light in to make it pleasant. In autumn, the leaves turned into many different color1s. Its beauty touched my soul. Many times I thought to take photos but never did. Then I had to leave in a hurry. Later in life it became a great regret that I had not done so. Actually, many times in our lives, we think we own something, therefore we don't cherish it. We don't feel regretful until we lose it one day! Moreover, sometimes, we have to accept the things we don't want and need to discover the hidden beauty to find unexpected joy!
Question: The author of the passage employed a writing way _ .
Options: (A) of holding and releasing (B) that released first, then held (C) that held first, then released (D) that was not holding or releasing
[A]: C

[Q]: Article: The tallest building in the United States, the One World Trade Center, opened on November 3, 2014 in New York. The building is 1,776 feet tall, making it the 3rd tallest building in the world. It has 104 floors. The building stands in the area where the twin towers of the World Trade Center once stood. On September 11, 2001, a group of terrorists destroyed these twin towers and killed nearly 3,000 people. It took 8 years to build the new One World Trade Center. Does the height of the building in feet reminds you of something in history? _ is the year when the United States declared its independence from Great Britain. One problem with such a tall building is how to clean the windows. Well, a platform hangs from ropes, and workers on the platform clean windows. On November 12, while two men were busy cleaning windows, a rope of the platform broke near the 68th floor. The two men were saved by cutting a hole in the glass window. The two tallest buildings in the world are the BurjKhalifa in Dubai, UAE and the Makkah Royal Clock Tower in Mecca, Saudi Arabia.
Question: When did the One World Trade Center open?
Options: (A) September 11, 2001. (B) September 11, 2011. (C) November 3, 2006. (D) November 3, 2014.
[A]: D

[Q]: Article: As we know, the earth's climate has changed over time.The present rate of climate change depends, in large part, on human activities.Today, people all over the world are making everyday choices that help the environment.Small actions matter.In other words, climate change is your business. A woman in Nicaragua buys fluorescent light bulbs that are 80 percent more energysaving than traditional ones. Many governments are now _ energysaving lights to encourage people to turn to them.Consumers are discovering that the newgeneration bulbs help them save money in the long run. Agriculture accounts for about 14 percent of global greenhouse gas emissions , and transporting the food around adds to the environmental cost.There is a team of young vegetable growers in the United Kingdom who want to encourage kids to start planting their own fruit and vegetables. A young lawyer wearing business clothes rides her bicycle to work in a large U.S.city.She's been biking to work every day for the past two years and says it's a lot easier than many people think.A recent study shows that more Americans bike or walk to work today than before. A university student from southeastern China carries a reusable shopping bag to cut back on disposable plastics.Some large shopkeepers have removed paper and plastic bags, and consumers are responding. In Canberra, Australia, summers are hot and winters cold.To save electricity, Adam Wilson in Canberra uses an energysaving heating system, and he keeps the temperature lower than he did in years past.He still makes it through the summer without air conditioning.
Question: The passage mainly tells us that _ .
Options: (A) climate change is concerned with everyone (B) the global warming is getting worse (C) saving energy is of great necessity (D) human is to destroy the environment
[A]:
A