All over the world the mobile phone has
题型：选择题
问题：
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
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