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There has been a lot of constroversy about...: có rất nhiều tranh cãi về...
The author argues that there is more diversity of life in the sea than in the rain forests because
It could run 100 metres in a little over six seconds, which would beat modern Olympic (28) ________ more than a third of the track behind.
The (26) ________ group will appreciate the recent study, as a hunter is more likely to require such speed.