问题
【C11】A.establishB.establishingC.establishedD.to establish
【C11】
A．establish
B．establishing
C．established
D．to establish
请帮忙给出正确答案和分析，谢谢！
Fatal error: Uncaught [XSException] ../../../usr/local/xunsearch/sdk/php/lib/XS.php(2559): Connection refused(C#111, localhost:8384)
thrown in /usr/local/xunsearch/sdk/php/lib/XS.php on line 2559
