There are many ways of defining success. It is accurate to say that each of us has our own concept of success to the extent that each of us is responsible for setting our own goals and determining whether we have met these goals satisfactorily. Because each of us possesses unique differences in genetic ability and favorable environments in which to express these abilities, it is necessarily true that we must define success broadly.
For some people, simply being able to live their life with a minimum of misery and suffering is considered a success. Think of the peace of mind of the poor shepherd who tends his sheep, enjoys his frugal life with his family in the beauty of nature, and who is respected because he does a good job of achieving the goals expected of and accepted by him and his society. On the other hand, it seems that even though some people appear to be rich in material possessions, many of them seem to be miserable and consider themselves unsuccessful when judged by their own standards of success. Because not all ventures can be successful, one should not set unrealistic goals for achieving success, but if one has self-confidence it would be unfortunate to set one’s goals at too low a level of achievement. The last paragraph implies that ______.
[A] we should have high goals [C] success means taking a walk in the park
[B] success means achieving great goals [D] success means trying one’s best at what one really likes

[A] involves [C] reveals
[B] takes [D] invites

According to preliminary market surveys, there are 10,000 would-be space tourists willing to spend ＄1 million each to visit the final frontier. Space Adventures in Arlington have taken more than 130 deposits for a two-hour, ＄98,000 space tour tentatively set to occur by 2005. This may sound great, but there are a few hurdles. Putting a simple satellite into orbit--with no oxygen, life support or return trip necessary— already costs an astronomical ＄2,200/kg. And that doesn’t include the cost of insuring rich and possibly litigious ( 爱打官司的 ) passengers. The entire group of entrepreneurs trying to comer the space-tourism market has between them "just enough money to blow up one rocket".The U.S. space agency has plenty of money but zero interest in making space less expensive for the little guys. So the little guys are racing to do what the government has failed to do: design a reusable launch system that’s inexpensive, safe and reliable. Kelly Space’s prototype looks like a plane that has sprouted rocket engines. Rotary Rocket in California has a booster with rotors to make a helicopter-style return to earth. The first passenger countdowns are still years away, but bureaucrats at the Federal Aviation Administration in Washington are already informally discussing flight regulations. After all, you can’t be too prepared for a trip to that galaxy far, far away.