In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
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Question: Trains crossing snowfields, winding through meadows, passing by mountains, by day and night, through winter and summer. These stunning images are the work of one photographer in his quest to capture the incredible beauty of China's railway lines. Wang Wei, 25, has travelled more than 185,000 miles over the past 10 years and taken more than 300,000 photographs across the country, reported the People's Daily Online. Now, some of the photographs will feature in a new book called Running After Trains, to be published in July. The freelance photographer tells MailOnline his new book will focus on the photography techniques for shooting trains, and he hopes his photos can show the beauty of Chinese railways to more people.Wang Wei, 25, has travelled more than 185,000 miles over past 10 years and taken more than 300,000 photographsHis obsession with trains began aged 11 when he stole his parents' camera and went down to the railway trackHe spends five months travelling every year, and has been everywhere from Gobi desert to the Russian borderSome of the photographs will feature in Wang's new book Running After Trains, due to be published in JulyChina's vast railway network is 75,000 miles long - the second largest in the world behind the United States 
 Question:'The authorities don't promote _ trains and railways often enough, but they are so beautiful and they belong to every one in China,' says Wang.

Answer: China


Question: Ottawa, Canada (CNN) What's going on with Justin Trudeau? Since his surprising election last October, Trudeau has enjoyed soaring popularity as the young, hip, progressive Prime Minister of Canada. Blessed with charm, good looks, a name and a photogenic family, he has become an overnight international celebrity. Promising "sunny ways" after a decade of the divisive politics of Stephen Harper and his Conservatives, Trudeau and his Liberals have proclaimed a new tone of civility in Parliament in their seven months in office. But all that dissolved on the floor of the House of Commons Wednesday in a fracas both unseemly and unprecedented. At the center was a less saintly Trudeau: petulant, impatient and later, embarrassed and "unreservedly" apologetic.Andrew Cohen: Canadian Prime Minister involved in a parliament fracas that has some questioning his maturity for jobCohen: He apologized, but popular PM has lost his shine; has learned early lesson on governing, discipline, the scrutiny of celebrity 
 Question:"I apologize to my colleagues, to the _ as a whole and to you, Mr. Speaker, for failing to live up to a higher standard of behavior," he said Thursday.

Answer: House of Commons


Question: Twitter has named interim Chief Executive Jack Dorsey as its permanent CEO. Dorsey has served as interim CEO for the past three months, after former Dick Costolo stepped down in July. Dorsey will remain the head of fast-growing mobile payments company Square, potentially setting up a conflict of interests for the co-founder of both companies. Twitter previously said the CEO job would be a full-time position, which seemed to exclude Dorsey as long as he continued to run Square. Dorsey is also CEO of mobile payment service Square, a job he has repeatedly said he intends to keep as he prepares to take that San Francisco company public too.Dick Costolo stepped down from role at the beginning of JulyRumours had circulated that interim CEO would be made permanentDorsey will also remain CEO of payment firm SquareTwitter previously said the job would be a full-time position, which seemed to exclude Dorsey as long as he continued to run Square 
 Question:Costolo had been _'s CEO for five years and led the company through a successful stock market debut in 2013.

Answer:
Twitter