Tom ______ close the window when his attention was caught by a bird.

(2013·郑州高中毕业班第一次质量预测)—Did you enjoy meeting your old schoolmates at the party last week?—Yes, I did. We ________ each other since we graduated from college.

 In April last year, thousands of holiday-makers in Europe remained ___________ abroad  due    to the volcanic ash cloud.                                                                                  

Li Gang, a police officer, said that little about what his son _____ he know the moment all the media reported the traffic accident _____ in Hebei University．

Large quantities of oil      in a place near my hometown recently.