1) LinkedIn is a social networking site for professionals. It (A1) ... in 2003 and a) is launched b) was launching c) has been launching d) was launched e) has launched 2) it (A2) ... mainly for professional networking. a) now uses b) is now using c) is now used d) will now use e) has now used 3) The number of LinkedIn users is increasing very fast: two new members join the website every second. It now has over 875 million users, and 40% of them check their profile every day. Professionals nowadays use the site to find jobs and business opportunities, and companies search for potential candidates. Users can follow different companies and also see who (A3) ... their profile page. a) will already be visited b) has already visited c) had already visited d) was already visited e) is already visited 4) Other features include groups and online conversations. It is estimated that over 200 conversations (A4) ... place right now. a) are taking b) were taking c) are taken d) will be taken e) had taken

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