单项选择题

Three fundamental aspects of (forest conversation) are the protection of immature trees, the use (of proper) harvesting methods, and (provide) for an environment (that supports) reproduction.

A．forest conversation
B．of proper
C．provide
D．that supports
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单项选择题
The first fiction (writer) in the United States to (achieve) international (fame) was Washington Irving, who wrote many stories, (included) Rip Van Winkle' and The Legend of Sleepy Hollow'.
A．writer
B．achieve
C．fame
D．included
单项选择题
Lyndon B. Johnson (was) the only United States President (who) oath of (office) as (administered) by a woman Judge called Sarah Tilghman Hughes.
A．was
B．who
C．office
D．administered
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