剑十Test3 Passage3 Beyong the blue horizon 阅读题疑问？

Question

36.It is now clear that the Lapita could sail into prevailing wind.选了Not Given，但是答案是NO环球雅思参考答案如下：通过prevailing trade winds定位到第七段’The Lapita’s thrust into the Pacific was eastward, against the prevailing trade winds’原文说against而题目中是sail into，完全相反，因此选NO。 新东方的解析如图所示：按照顺序答题的概念。答案应该是在第九段。没有证据显示是否掌握，难道不是not given？请问大神们，这道题目的答题点在哪里？另外文中有一句，They could sail out for days into the unknown and access the area，secure in the knowledge that if they didn't find anything，they could turn about and catech a swift ride back on trade winds.解析中说secure是独立结构，如何解释？

Answer 1

参照原文第九段：all this presupposes one essentil detail.....“the Lapita had mastered the advanced art of sailing against the wind.'And there is no proof they could do any such thing.'
所有这些以一个必要细节为前提。。。。Lapita已经掌握了顶风航向的先进技艺，但是并没有证据可以证明他们有能力做任何这样的事情

Answer 2

FRUITY FUNS.