They set out to __________ (积累) a huge mass of data for the research.
It's of no use _________(抱怨）.
The new guest hotel's finished, but it's not yet _________(配备家具）.
UNESCO works to _________(缓解）the suffering of the childrenthroughout the world.
It took several seconds for his eyes to _________(适应）to thedark.
Karl Marx was born in Germany and German was his _________(本国的）language.