以下哪一项不是急性阑尾炎的体征：

A．右下腹压痛

B．可向右肩部放射

C．腹肌紧张

D．结肠充气试验阳性

E．直肠指诊有触痛

Peter likes readlig a newspaper _____he is having breakfast.   [ ]

A. until    

B. while

C. because    

D. though