以下选项中可作为C语言合法常量的是( )。

A．-80.
B．-080
C．-8e1.0
D．-80.0e

As we have known from the map of the world,this is _____.[ ]

A. twice as large an island as that

B. twice as larger as that island

C. as twice large as that one

D. twice as a large island as that