You ________ do the work now. You can do it tomorrow.

A．needn’t to

B．don't need

C．don’t need to

D．need to not

患者，男，65岁，腰背痛3个月，尿本-周蛋白阳性，CT示腰椎多个椎体有大小不等的圆形或不规则低密度病灶，首先考虑为

A．转移瘤

B．骨质疏松

C．多发性骨髓瘤

D．淋巴瘤

E．血管瘤