The Great Wall istourist attraction that millions of people pour in every year.
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249. A_____ has taught us what atoms are made up of and how powerful the atom bomb is.
248. A group of the red scarves are playing on the seaside_______.
247. He found it quite impossible to learn _____ well in less than 6 months so he registered for the next semester(term).
246. Nelson Mandela played and is still playing a leading ________ in ending apartheid(种族隔离政策) in South Africa.
245. After work, the young man and his colleagues went to the nearest _____ and sat down at the table for a grand dinner.