下列选项中，( )是整个法律体系的基础。
A．刑法
B．宪法
C．民法
D．行政法
参考答案：B
I have ________eraser.[ ]
A. a
B. the
C. an
The chair looks rather hard, but in fact it is very comfortable to _______.
A．sitting
B．sit on
C．sit
D．being sat on
