请问2.14北美机经会有吗，在论坛上怎么能找到

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求教几个问题

1请问2.14北美机经会有吗，在论坛上怎么能找到

2 请问口语三、四题只要求说和听力相关的内容吗，还需要记阅读材料的笔记吗，口语三至六题用什么材料联系啊，好像第四题有一种二元对立类题型，蓝DELTA或者BARRON上有这样的例子吗

3 请问这句话的意思和语法结构

Earth is a target in a cosmic shooting gallery, subject to random violent events that were unsuspected a few decades ago.

大谢~