________ scientists have done a lot of research on A（H1N1）flu，there are still some cases for further study．
A．As B．Once C．If D．Although
科目：初中英語(yǔ) 來(lái)源： 題型：
________ scientists have done a lot of research on A（H1N1）flu，there are still some cases for further study．
A．As B．Once C．If D．Although
國(guó)際學(xué)校優(yōu)選 - 練習(xí)冊(cè)列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專(zhuān)區(qū) | 電信詐騙舉報(bào)專(zhuān)區(qū) | 涉歷史虛無(wú)主義有害信息舉報(bào)專(zhuān)區(qū) | 涉企侵權(quán)舉報(bào)專(zhuān)區(qū)
違法和不良信息舉報(bào)電話：027-86699610 舉報(bào)郵箱：58377363@163.com