19. Six out of every ten prisoners in chains are black, which is ___ the chain gangs call up images of slavery in centuries gone by. A. where B. when C. what D. why 20.Robots differ from automatic machines ___ after completion of one specific task,...
1.Where are you from? -Well,I'm just from here,Beijing. -I'm from Yantai,a small coastal city in Shandong Province. -I'm from Chongqing,a hilly city in the western region o...
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