单项选择题

Of the 9500 drivers since the beginning of the year, 23% were found in road knowledge.

A．tested
lacking
B．having been tested
to lack
C．tested
lacked
D．to have been tested
lack

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单项选择题

单项选择题

Of the 9500 drivers ______ since the beginning of the year, 23% were found ______ in road knowledge.