she is always nervous__speaking in public.A.of B.about C.in

she is always nervous__speaking in public.A.of B.about C.in D.for
谁能帮我分析下为什么用about,其他几个为什么不对?

nervous of 一般都作“害怕、担心”的意思,如：
I'm extremely nervous of missing the train.
我非常担心我会赶不上火车.
Jim's always been a little nervous of dogs.
吉姆总是对狗感到有些害怕.
nervous in是指在某种环境下感到害怕或紧张,如：
Are you nervous in the dark?
你在黑暗中感到害怕吗?
nervous for后面一般跟让人感到紧张的事或人
Some children said they were nervous (for) exams.
一些孩子对考试很紧张.
只有nervous about doing sth.可以解释为,做某事令人紧张.

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