The fact that so many people still smoke in public places ________ that we may need a nationwide campaign to raise awareness of the risks of smoking．[ ]

A．suggest  

B．suggests

C．suggested  

D．suggesting

以下各项都可出现多克隆性免疫球蛋白增多，除外

A．慢性感染

B．类风湿关节炎

C．淋巴瘤

D．多发性骨髓瘤

E．系统性红斑狼疮