You can't help wondering how much he has changed. He is not what he _____. 　　[ ]

A. would be 　　　　　　　　　

B. used to be 　　

C. was used to be 　　　　　　

D. was used to being

如图标志的含义是什么（）

A．禁止掉头

B．禁止左转弯

C．准许掉头

D．准许左转弯