—Tommy is planning to buy a car.

—I know. By next month he _____ enough for a used one.

A．will have saved

B．saved

C．will save

D．saves

妊娠27周，孕妇血清巨细胞病毒IgM，IgG阳性，诊断胎儿宫内巨细胞病毒感染最有价值的是()

A．孕妇尿液，脱落细胞分离出巨细胞病毒

B．孕妇宫颈脱落细胞分离出巨细胞病毒

C．羊水巨细胞病毒IgM阳性

D．胎儿脐血IgM阳性

E．胎盘绒毛组织IgM阳性