Her brother        be at home now, because he was seen playing basketball in the stadium just now.      

A．mustn’t

B．needn’t

C．can’t

D．shouldn’t

患者，发热，颈部及腹股沟可触及包块。清洁灌肠后，行中腹部超声检查，声像图表现如图，最可能的诊断是()

A．淋巴瘤

B．胰头癌

C．结肠癌

D．腹腔结核

E．腹膜后肿瘤