羊，4岁，采食新鲜玉米幼苗后约半小时，腹痛不安，呼吸浅表、加快，肌肉震颤，全身惊厥，流白色泡沫状唾液；呼出气苦杏仁味，后全身极度衰弱，很快倒地，体温下降，后肢麻痹，肌肉痉挛，瞳孔散大。该病可视黏膜（）

A.鲜红

B.苍白

C.发绀

D.黄染

E.潮红

--- What were your parents doing at eight last night?

--- My father was cooking while my mother        .

A．watched TV

B．were watching TV

C．is watching TV

D．was watching TV