单项选择题
（）we can succeed or not depends on how well we cooperate.
A．Then B．Thus C．What D．Whether
单项选择题 Janehadn'tbeentoLondonbefore（）hadherhusband.
单项选择题 NosoonerhadhearrivedinRome（）heheardofthegoodnews.
单项选择题 Mr.Cookhasnotcommented（）thesereports.
