U.S. President Donald Trump expressed optimism about a planned meeting with North Korean leader Kim Jong Un following conversations Saturday with South Korean President Moon Jae-in and Japanese Prime Minister Shinzo Abe. Trump tweeted he had a "very good talk" with Moon and updated Abe on plans for his anticipated summit with Kim. Key U.S. leaders are expressing growing optimism that decades of hostility on the Korean Peninsula are closer than ever to coming to an end. Trump said at a White House news conference with German Chancellor Angela Merkel Friday "I don't think he's playing" when asked about the historic summit between North and South Korea. Trump added a meeting would be scheduled "very shortly" but didn't specify a timeline, saying up to three possible sites are being considered for the much-anticipated summit in late May or early June. Earlier Friday, Kim became the first North Korean leader to set foot in South Korea, when he crossed the border to shake the hand of South Korean President Moon Jae-in. The two leaders agreed to work toward removing all nuclear weapons from the Korean peninsula and vowed to pursue talks that would bring a formal end to the Korean war. North Korea has in the past made similar commitments about its nuclear program, but failed to follow through. Asked whether Pyongyang's commitment is real this time, Trump said "we're not going to get played." "This isn't like past administrations. We don't play games," said Trump, adding that previous administrations had been "played like a fiddle." "We will come up with a solution, and if we don't we will leave the room," he said. U.S. Defense Secretary Jim Mattis also expressed hope Friday that talks with North Korea will bear fruit. "I can tell you that we are optimistic right now that there's opportunity here that we have never enjoyed since 1950," Mattis said before a meeting at the Pentagon with the Polish defense minister. "I don't have a crystal ball," he added. "So, we're going to have to see what they produce." why is Jim Mattis hopeful? Pick the correct answer from the following options: A. That Trump can meet Kim Jong Un B. That they can remove North Korea's nuclear weapons C. That Trump will talk to Moon Jae-in D. not enough information
B

I've often been asked, "What is a blog?" This is my attempt to answer that question in a simple way. The word blog is short for web log and although the quick answer for me would be "a web journal" or "online diary," I think blogs encompass more than that. Blogs are platforms for people to write about pretty much anything and everything. I was first introduced to the concept when a few friends starting writing family blogs as a way to keep in touch with distant friends and relatives or keep up with documenting their lives for themselves or their children. Sort of like a modern day scrapbook or baby book. Then, I followed a couple friends as they blogged about traveling around America. One's purpose was to find a small town to settle in and the other's purpose was to kill time while unemployed and waiting for a call to serve as a minister. Now I follow all sorts of blogs. There are blogs about dogs, traveling, kids, cooking, religion, fitness, politics, crafts, parenting, writing, educating, interior design, you name it! There are even blogs about blogging! Individuals run blogs. Groups of friends run blogs. Businesses run blogs. Religious institutions run blogs. Blogs are a way for people to connect over certain topics and interests, socializing in the ever-growing blogosphere. Chances are, you've read blog posts without even realizing it. Most look like an article you'd find on any website. But blog posts typically have a personal touch. They're a wonderful way for people to share tips, tricks, tutorials, inspiration, and more with others. If you want a more thorough definition of the term blog, this one is from Wikipedia. Blogs are also a way for businesses to advertise through honest reviews and giveaways. They partner up with bloggers to spread the word about their products or services. So, some bloggers are also advertisers. When was the author first introduced to blogs? Pick the correct answer from the following options: A. after a few friends started writing family blogs to keep in touch with family and friends B. not enough information C. after having a baby D. before having a baby
A

(Question)
For active people, regular training is as important part of maintaining and increasing fitness. About the only real downside to regular exercise is the transient toll it takes on the body after a hard training session. The pain and soreness after training needs sufficient time to recover from before another hard session can be performed. A very plausible theory pushed for many years is that the post-exercise oxidative stress in the body is the primary cause of the muscle damage and fatigue experienced. If you could reduce this oxidative stress, then it would allow quicker recovery, and then more time spent training. What this theory ignores though is that oxidative damage is a natural part of how the body adapts to stressful exercise, allowing the body to repair and grow stronger to allow higher levels of performance in the future. A small scale study has previously found that trained and untrained individuals who dose up on antioxidant supplements impair important exercise training adaptations such as improved insulin sensitivity and production of oxidative stress defence proteins. Now researchers have extended this study by looking at the effect of antioxidants in trained female runners, and published their findings in the European Journal of Sports Science. Twenty-three well trained female runners took part in three separate 3-week training blocks where they took either 1 gram of vitamin C, blackcurrant juice, or a placebo drink for each of the training blocks. Each of the dietary interventions involved drinking a similar volume of fruit drink of a total of half a litre per day split over the morning and evening. The training performance of each runner was carefully measured at the beginning and end of each 3-week treatment period. The runners stuck to a set training schedule which allowed a more accurate assessment of any changes in performance over the training period. What is a bad thing about daily exercise? Pick the correct answer from the following options: A. it can damage the body B. it changes your performance C. not enough information D. it produces oxidative stress
(Answer)
A