单项选择题

This is the unique solution to our problem().

A. only
B. alone
C. single
D. lonely

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单项选择题

Examination papers of the class were marked without bias.()

A. immediately
B. correctly
C. fairly
D. carefully

单项选择题

We had a long conversation about her parents.()

A. talk
B. speech
C. debate
D. discussion

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