单项选择题

How to talk to a Martian is an academic question.

A．a theoretical
B．an educational
C．a scholastic
D．a general
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单项选择题
He erased all the pencil marks on the book.
A．left
B．noted
C．wrote
D．rubbed out
单项选择题
That was an awful crime.
A．a terrible
B．a poor
C．an extreme
D．an amazing
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