用所给单词的适当形式填空，使句子意思完整，正确。
I’m very grateful for Mr. Johnson’s help with my job, so I will thank him __________ (personal).
I must __________ (apology) for not letting you know the plan ahead of time.
The __________ (perform) of the street artist was so great that it attracted the attention of all passers-by.
He is looking forward to __________ (admire) the classic music by Beethoven at the concert.
_________ (confident) is the first step to success.   
Don’t worry. The problem has been __________ (solve).
Then the question __________ (arise) at the meeting, but no one knew how to answer it.