单项选择题


A．experience
B．occurrence
C．encounter
D．sighting
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单项选择题
Most computer users have never received any formal keyboard training. _______, their keyboard skills are inefficient.
A．previously
B．Subsequently
C．Consequently
D．Successively
单项选择题
The biography cited more than a hundred source books that the author had _______.
A．consulted
B．sought
C．inquired
D．inferred
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