uld only be predicted by wise men\rE c. the river sometimes flooded too little or too much\rC D. the river took the good soil away to Ethiopia\r9. The Egyptians of that time learned to predict the floods b y .\rQ A. studying the flooding of the Nile year by year\r. B. observing the position of the stars year by year\rC. inventing some maps of the Nile floods\rQ D. developing engineering and measuring land\r10. According to the passage, the ancient E g y p t i a n s .\rE A. had studied the stars and made their own calendar of the years\r B. watched the fall and rise of the Nile and learned how to control the flood\rC C. discovered science before the peoples of other nations\rD. learned a lot about geometry and spread the knowledge all over the world
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