Google Inc. raised the specter of Microsoft Corp. using its proposed $42 billion acquisition of Yahoo Inc. to gain illegal control over the Internet, underscoring the online search leader's queasiness about its two biggest rivals teaming up. The critical remarks, posted online Sunday by Google's top lawyer, represented the Mountain View-based company's first public reaction to Microsoft's unsolicited bid for Yahoo since the offer was announced Friday. "Microsoft's hostile bid for Yahoo raises troubling questions," David Drummond, Google's chief legal officer, wrote. "This is about more than simply a financial transaction, one company taking over another. It's about preserving the underlying principles of the Internet: openness and innovation."