如果要取消预定在第二天使用的宾馆，应______。
A．在宾馆结帐前告知前台B．在离开时告知宾馆C．不缴纳订金D．通过电话告知楼层服务员
参考答案：A
已知关于x，y的二元一次方程（a-1）x+（a+2）y+5-2a=0，当a每取一个值时，就有一个方程，而这些方程有一个公共解，试求出这个公共解．
5．I thought things would get better, but ,______, they are getting worse.
A．as they are
B．as it is
C．as it was
D．as they were
