劳动者加班应否支付加班工资（）。
A．应当支付加班工资
B．不应当支付加班工资
C．应视加班时间长短而定
D．只在节假日加班才支付加班工资
参考答案：A
—There is a man for you outside, Mr Wang. Can he come in now?
—No, please ask him to wait for a few minutes. [ ]
A. waiting
B. to wait
C. waited
D. waits
以重油为燃料的炉子开、停炉前应对燃油管路作什么？为什么？
