梵帝冈是世界上最小的国家,它的面积仅有4.4×105米2,相当于天安门广场的面积.梵帝冈国土面积的百万分之一有多大?大约相当于( )的面积.
A:一间教室
B:一张讲桌
C:一块黑板
D:一本数学课本
— Don't worry. I think as soon as he _______, he will give you a call.