—Can I have a day off tomorrow, Mr. Johnson?
—________. I can manage without you.
A:I'm afraid not
B:It doesn't matter
C:Of course
小明每分钟打字108个,大约是____个。
不等式组3-x⩾2(x-3)3x+12-2x-13>-1的所有整数解的和是 ____.