单项选择题

Some science students reach a high ______ of English competence in communication.

A．level
B．plane
C．surface
D．live
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单项选择题
The newly - formed United States took as its emblem a bald eagle with ______ wings.
A．graceful
B．colorful
C．grand
D．outspread
单项选择题
They ______ those who didn't conform to their ideas, and made advantage of those who agreed with them.
A．explored
B．persecuted
C．extended
D．pinched
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