All over the world the mobile phone has leaped from being an impossible luxury in the early 1980s to        most people would now call a necessity.

A．which

B．that

C．what

D．when

在非洲为揭开人类的神秘面纱而工作，有“考古、人类学第一家族”之称的是（）.

A、路易斯家族

B、洛克家族

C、撒丁家族

D、利基家族