单项选择题

Efforts to reach the injured men have been ______ because of a sudden deterioration in weather conditions.

A．enforced
B．intensified
C．continued
D．strengthened
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单项选择题
I don' t understand why people ______ such a beautiful garden with cans and bottles.
A．located
B．provided
C．protected
D．littered
单项选择题
The Olympic Games were watched by ______ billions of people around the world.
A．virtually
B．literally
C．deliberately
D．appropriately
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