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
To save more money you'll need to be more frugal.
A．lucky
B．intelligent
C．hard-working
D．economical
单项选择题
They purchased a car last week.
A．bought
B．lost
C．got
D．sold
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