单词：Spilsby sandstone
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The rock called sandstone is made up of a great many grains of sand. The beating of the rain on this rock washes the grains apart, and so the hard sandstone slowly changes into loose sand. 砂岩主要由大量沙粒组成。当雨水打下来的时候
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Lois has a headache. The headache started one hour ago. She doesnt know why she has a headache. She never gets headaches. She never gets sick. Lois is a healthy woman. Where did her headache come from? Was it something she ate? Was it something she d
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By Noel King Goma, DRC 22 November 2007 Food prices are skyrocketing in eastern Congo's volatile North Kivu province as Laurent Nkunda's rebels and the Congolese army engage in what aid workers and the United Nations are calling a game of stopping an
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Lesson 50 Only A Stone 第50课 只是一块石头 What is the oldest thing you have seen? One boy thinks it is a church, for he has seen a date on one which tells that it was built hundreds of years ago. 小朋友，你见过的最古老的东西是什
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