Little _____ that we were watching his every move, so he seemed to be going his own way in this business.    

A、<span lang="EN-US" style="font-size:12.0pt;font-family: &quot;Times New Roman&quot;,serif;mso-fareast-font-family:宋体;mso-font-kerning:1.0pt; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">he realized&nbsp;</span>

B、<span lang="EN-US" style="font-size:12.0pt;font-family: &quot;Times New Roman&quot;,serif;mso-fareast-font-family:宋体;mso-font-kerning:1.0pt; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">he didn\'t realize&nbsp;</span>

C、<span lang="EN-US" style="font-size:12.0pt;font-family: &quot;Times New Roman&quot;,serif;mso-fareast-font-family:宋体;mso-font-kerning:1.0pt; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">didn\'t he realize</span>

D、<span lang="EN-US" style="font-size:12.0pt;font-family: &quot;Times New Roman&quot;,serif;mso-fareast-font-family:宋体;mso-font-kerning:1.0pt; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">did he realize</span>