The audience was really worked ____ by this time.

題目：

The audience was really worked ____ by this time.
A) out (B) over (C) on (D) up
分別解釋爲什麼?

解答：

D up
be worked up = to be moved or stirred the feelings; be excited.
情緒被撥動了,觸動、激動、感動
while
work out =
a.to bring about by work,effort,or action.
b.to solve,as a problem.
通過努力達到一個結果,作出、弄出
work over = to study or examine thoroughly:
比如：For my term paper I worked over 30 volumes of Roman history.
work on or upon = to exercise influence on; persuade; affect:
如：I'll work on her,and maybe she'll change her mind.