精听建议：

　　先完整地把一条新闻听一到三遍，争取掌握大意。然后，一句一句精听，力争每句话都听明白。遇到实在不懂的地方，再听写。

　　下面的文本材料中空缺部分里面要填的词都很简单，不过是一些值得注意的连读或者典型的美式发音哦，有些语速比较快。试试看，你能不能全部写对？

　　（参考文本，欢迎指出错误^^）

　　And he notice something, the crabs that like to crash and eat snails tend to have powerful right claws. That reminded Diedo who’s also a righty of sports “Having played sports myself as a child, remember there is, you know, this thing of ___1___. But I thought we’ll trying to look at this a little bit more.” What sports did you play? “I played baseball.” How did you like ___2___ left-handed pitchers? “ I wasn’t very good at it.” So he wondered do right-handed crabs have a problem when facing a left-handed snail. To find out first he went back in time, his team___3___ nearly two thousand fossil snail shells most were 3 or 4 million years old, and about half were lefty species and half righties. Then the researchers looked at every shell. They wanna to see did ancient crabs ___4___the right-handed snails or the lefties. What they found is that the right-handed shells had far more scars meaning far more crab attacks. “So it’s kind of like being a detective almost when you ___5___, each shell tells a story to me.”

　　参考答案：

　　1.left-handed advantage

　　2.hitting against

　　3.rounded up

　　4.prefer to attack

　　5.go back into the past