在求一个正则表达式~~
<SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体 "> 补出下列句子中省略的主语: <BR> <SPAN lang=EN-US style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> <BR> 1 </SPAN> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 、
<DIV id=fill_empty1 style= "DISPLAY: inline; FONT-SIZE: 12px; WIDTH: 70px; BORDER-BOTTOM: #3300ff 1px solid; FONT-FAMILY: 宋体; HEIGHT: 15px " ms_positioning= "FlowLayout " ;align= "left "> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 渔人 </SPAN> </DIV> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 便舍船,从口入。
<DIV id=fill_empty2 style= "DISPLAY: inline; FONT-SIZE: 12px; WIDTH: 70px; BORDER-BOTTOM: #3300ff 1px solid; FONT-FAMILY: 宋体; HEIGHT: 15px " ms_positioning= "FlowLayout " ;align= "left "> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 山洞 </SPAN> </DIV> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 初极狭,才通人。 <BR> </SPAN> </SPAN> </SPAN> <SPAN lang=EN-US> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office " /> <o:p> <SPAN lang=EN-US style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> <BR> 2 </SPAN> <SPAN style= "FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman '; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA "> 、
<DIV id=fil