在交际中谈话的艺术是（）
A.唠叨
B.严肃
C.亲切、友好、尊重、随和
D.悲观
参考答案：C
Lucy is ill. She has been away from school for ______.[ ]
A. one day and half
B. one and half a day
C. one and a half days
D. a half and one days
调度操作指令执行完毕的标志是（）。
