用所给单词的适当形式填空，使句子意思完整，正确。

小题1:I’m very grateful for Mr. Johnson’s help with my job, so I will thank him __________ (personal).

小题2:I must __________ (apology) for not letting you know the plan ahead of time.

小题3:The __________ (perform) of the street artist was so great that it attracted the attention of all passers-by.

小题4:He is looking forward to __________ (admire) the classic music by Beethoven at the concert.

小题5:_________ (confident) is the first step to success.   

小题6:Don’t worry. The problem has been __________ (solve).

小题7:Then the question __________ (arise) at the meeting, but no one knew how to answer it.

(五)某公司准备投资开发新产品，现有A、B两个产品可供选择。根据市场预测，未来市场状况存在繁荣、一般、衰退三种可能性，概率分别为0.3、0.5和0.2，两种产品在不同市场状况的预计年报酬率如下表所示。为了做出正确决定，公司需进行风险评价。

期望报酬率的标准离差反映的是（）对期望值的偏离程度。

A．各种可能结果

B．各种可能结果的最大值

C．各种可能结果的最小值

D．各种可能结果的平均值