单项选择题

The conference explored the possibility of closer trade links.

A. rejected
B. investigated
C. proposed
D. postponed
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单项选择题
The meaning is still obscure.
A. vague
B. transparent
C. alien
D. significant
单项选择题
The Klondike was the scene of one of the biggest gold rushes the world has ever known.
A. location
B. view
C. event
D. landscape
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