He started to learn English in 1990 and in the years ________ he kept on using it in his work.
When he ________ the door,he found his keys were nowhere.
In April,2009,President Hu inspected the warships in Qingdao,________ the 60th anniversary of the founding of the PLA Navy.
________ not to miss the flight at 15:20,the manager set out for the airport in a hurry.
Many of them turned a deaf ear to his advice ______ they knew it to be valuable.
A fire broke out in the building at about 7 on Tuesday morning, _____ in the death of a young girl.