卫生器具的配件应齐全、外表面光滑、电镀均匀，（）
A.无裂纹
B.无砂眼
C.规矩
D.周正
参考答案：B
— Have you solved your problem?
— I’ve kept on thinking about that matter__________, but I have had no idea.
A．at times
B．some time
C．at a time
D．all the time
出票人签发一张500元的空头支票，按支付结算办法应处以罚款（）
A.500
B.25
C.1000
D.100
