从每小题A、B、C、D中选出一个划线部分与其它三个读音不同的选项，并将其代表字母填入题前括号内。
My parents will buy a piano for me if I _____ good grades in the tests.
I used to be afraid to speak in front of public before, but recently I _____ a lot.
We often talk in groups and share our ideas with _____.
Many people think that English is _____ of all the subjects.
She asked us _____ the dialogue and try to recite it.
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