—You forgot______ off the lights?   It’s still on.

—But I remember _______them off before I went out of the room.

A．turning; to turn

B．to turn; turning

C．turning ; turning

D．to turn; to turn

人体内残存了在其他哺乳动物体内相当发达的阑尾，这一生物进化中的证据属于       [ ]

A．化石证据               

B．比较解剖学证据     

C．胚胎学证据             

D．分子生物学证据