Question

四级英语作文高级句型书信体介绍活动安排

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Answer 1

All Newton himself had said, when he was lost in thought, an apple falling down to his thought of gravity. Newton then pointed out that, according to his law, gravity causes the moon along the elliptical orbit around the earth, and the earth and the other planets along the elliptical orbit revolve around the sun.

Answer 2

你可以看看这个，希望对你有帮助：
2015年6月大学英语四级作文预测35篇
[url]http://cet4.koolearn.com/20150529/792702.html[/url]