Many people believe that one of the （1） （关键）to success on the Internet is coming up with a business （2） （计划） that （3） （把……定为目标） a very specific market rather than a broad market. Big businesses who attempt to （4） （覆盖） the whole market often leave gaps that can be exploited. By specializing on a particular market, you may have a better（5） （机会）of success