It happened ____ the Long March.
Since the recent river pollution in several provinces, people _______ more and more attention to the quality and safety of drinking water.
Finally he reached a lonely island ________ was completely cut off from the outside world.
China’s first aircraft carrier, ____ as long as 304 metres, was handed over to the People’s Liberation Army navy in 2012.
It was difficult to tell exactly _______ the saying began, but it is possible that it was in the theatre or movie industry.
—The company has been performing poorly during the past few years.—In my view, it needs to _______ its image.