Ofthe100driverssincethebeigningoftheyear,10%werefoundinknowledgeabouttrafficroles.A.tohavebeentested;lackB.havingbeentested;tolackC.tested;lackingD.tested;lacked

Question

Of the 100 drivers____ since the beigning of the year,
10% were found_____ in knowledge about traffic roles.
A.to have been tested;lack B.having been tested;to lack C.tested;lacking D.tested;lacked

Answer 1

建议选择
Of the 100 drivers_tested_ since the beigning of the year,10% were found_lacking_ in knowledge about traffic roles.
年初对100名司机进行了测试后发现其中10%的人都缺乏交通法规知识~
tested表示被动,此处省略了whom were或that were；
find+动词ing形式