Must we finish all the homework today or tomorrow?                    

– You ____ worry about it. You may hand it in next week.

A． mustn’t

B．can’t

C．needn’t

D．shouldn’t

慢性胃炎胃黏膜活检示肠上皮组织转化时

A．手术
B．随访
C．药物治疗
D．补充血容量
E．消除病因