"Network managers have long {1 } practical voice-over-IP(VoIP) solutions. VoIP {2 } ease network management and decreases costs by converging at a company.s telephone and data infrastructures into one network. And a VOIP solution implemented at a company.s headquarters with far-reaching branch offices can { 3 }tremendous amounts of { 4 } in long distance phone bill, provided that solution delivers POTS-like voice { 5 } over the Internet. 1、( )：A、await B、awaited C、awaiting D、awaits 2、( )：A、promise B、promised C、promises D、promising 3、( )：A、get B、put C、save D、waste 4、( )：A、cash B、money C、space D、time 5、( )：A、frequency B、length C、quality D、quantity "
