I am so ____that I cannot even move a step forward.横线上首字母为e

I am so ____that I cannot even move a step forward.横线上首字母为e ____that an american car?----yes,I think so.填空 I am so I am so happy I am lost so i am so I am so over I am so happy. so I am I am so heartache i am so afired I am so sad I am so depressed i am so disappointed i am so said... so exhausted i am I think i am so I find it very important to learn English well.A.So I am B.So do I C.So I do D.So am I