当房屋的开间、进深较大，楼面承受的弯矩较大时，常采用( )。
A．板式楼板
B．无梁楼板
C．梁板式肋形楼板
D．井字形肋楼板
参考答案：C
_____, I was afraid of the dark, then I went to bed with my bedroom light ____.
A．To begin, off
B．Begin with,on
C．Start , off
D．To begin with, on
