某厂一台1000MW机组，5月份C级检修28天，其余时间全出力运行。当月机组运行小时是（）小时。
A、0
B、48
C、72
D、744
参考答案：C
There is ____ “h” in _____ word “hour”.
A．a; a
B．an; a
C．an; the
D．a; the
Since it was getting late and there were no hotels nearby, we decided to at a small inn for the night.
A．put off
B．put away
C．put in
D．put up
