Facebook is certainly not alone in placing sky-scraping evaluations on unproven startups, analysts say.

　　Blogging service Tumblr sold to Yahoo Inc. for more than $1 billion. Dozens more startups are valued at $1 billion or more.

　　Facebook is quick to point out that WhatsApp reached 450 million users faster than any company in history.

　　74. The phrase “take on” in the second paragraph most probably means ______.

　　A. show off

　　B. compete with

　　C. cooperate with

　　D. object to

　　75. Why do the technology giants start the battle for mobile according to the passage?

　　A. Because they all want to become number one in the field of technology.

　　B. Because all of them wish every customer to use tiny computers.

　　C. Because consumers prefer mobile devices to computers.

　　D. Because mobile devices are the latest technology at present.

　　76. According to the passage, what does the author imply?

　　A. Facebook’s decision is correct and reasonable.

　　B. Facebook’s decision is incorrect and unreasonable.

　　C. Facebook’s decision is acceptable but unreasonable.

　　D. Facebook’s decision is bright but adventurous.

　　77. What is the best title for the passage?

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