问题
单项选择题
—When will you be through with your work．Jones
—（）My boss usuallY finds something for me to do at the last minute．
A．Who knows
B．Would you help me
C．I beg your pardon
D．Anything the matter
答案
参考答案：A
解析：
考查交际用语。“Who knows”表示“谁知道(无法确定)”，与后句的含义相吻合。