I overslept because I stayed up too late last night.
我睡过头了,因为昨晚开夜车了。
Something urgent requires his attention at home.
他家里有要紧的事要他回去。
He's on sick leave.
他请病假.。
Tomorrow's the deadline for choosing classes.
明天是选课的最后期限。
I'll never make it on time to a 8 o'clock class.
我总不能赶去上8点钟的课.