-- I can't find David. Where is he?

-- He ________ for tomorrow's competition at home.

A．prepares

B．is preparing

C．has prepared

D．prepared

一贫血产妇，产程较长，肛诊次数较多，因胎盘残留行宫腔探查术，产后2周出现左下肢明显水肿、疼痛，发热，肿胀侧股静脉呈索条状、压痛。诊断可能是（）.

A.妊娠水肿

B.股白肿

C.肾盂肾炎

D.子宫内膜炎

E.盆腔血栓性静脉炎