中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。()
A、Sincethe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown
B、Beginningfromthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown
C、Asearlyasthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown
D、Untilthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown