单项选择题

The police officer thoroughly ______ the cause of the accident, but they couldn't find any trace.

A．explored
B．examined
C．investigated
D．analyzed
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单项选择题
Susan became ______ homesick and critical of the United States, so she fled from her home in west Bloomfield to her hometown in Australia.
A．thoroughly
B．sincerely
C．absolutely
D．increasingly
单项选择题
Becoming disabled by an accident is one of the most serious ______ that all drivers face.
A．faults
B．mistakes
C．hazards
D．shortcomings
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