—Do you still remember _______ me somewhere in Beijing?  

—Yes, of course. Two years ago.  [ ]

A. to see           

B. see           

C. seeing           

D. saw

下列叙述中不属于病毒特点的是[ ]

A．外壳由蛋白质构成    

B．内部含有遗传物质

C．属于单细胞生物    

D．在寄主细胞里进行繁殖