A tourist was visiting New Mexico and was amazed at the dinosaur bones lying about.

"How old are these bones?" the tourist asked an elderly Native American， who served as a guide.

"Exactly one hundred million and three years old.

"How can you be so sure?" inquired the tourist.

"Well，" replied the guide， " a geologist came by here and told me these bones were one hundred

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老师：请把“我的哥哥去学校”这句话改写成将来式。 学生：我哥哥的儿子去学校。