Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks.
"ZUCKERBERG’S rocket, ready for 1 " was the title of our article about Facebook’s upcoming initial public offering (IPO) that ran in last week’s 2 of The Economist. As the first day of trading in its shares, expected to be May 18th, 3 , the rocket’s payload is getting bigger. On May 16th the social network revealed it was 4 the number of shares available by 25%, to 421m, on the back of increased demand. On May 17th it set the price of its 5 at $38 each, 6 the company at $104 billion. The IPO is expected to raise more than $18 billion, making it one of the biggest in American 7 history.
The fact that Facebook’s 8 is already said to be heavily oversubscribed is remarkable for a couple of reasons. One is that it is taking place 9 the 10 of a turbulent global economy, with 11 in the euro-zone helping to depress stock markets almost everywhere. The other is that 12 continue to be raised about the company’s ability to 13 huge growth in its core online advertising business, which accounts 14 more than four-fifths of its revenues. Yet this will be essential if the firm 15 its lofty valuation.
The 16 case for Facebook 17 on the belief that the company can hit a mother-lode of ad dollars by finding new advertising 18 in the same way that, say, Google has minted money from text ads 19 alongside search results. But some companies are clearly not 20 by the social network’s efforts so far.