In April, 2009, President Hu inspected the warships in Qingdao,the 60th anniversary of the founding of the PLA Navy.
marking
marked
having marked
being marked
. Charles Babbage is generally considered _______ the first computer.
. The missing boys were last seen _______ near the river.
. The patient was warned _______ oily food after the operation.
. I regret _______ you that we are unable to offer you employment.
. You had better get a doctor _______ your bad tooth.