单项选择题

They have been trying to find out the identity of the writer of the ______ letter, but in vain.

A．infamous
B．autonomous
C．anonymous
D．unanimous
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单项选择题
Mrs. White is so ______ about her food that no cook will work for her.
A．special
B．peculiar
C．particular
D．especial
单项选择题
We intended to ______ you to make a speech on environmental protection in our university, but we couldn't find enough time to prepare for it.
A．invite
B．be invited
C．have invited
D．have been invited
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