At this point, we can say that it can't be heading number two.

据此，我们可以说第二个标题肯定不是。

They aren't, and so we can rule out heading number three.

并没有，所以我们可以排除第三个标题。

So you could now choose heading number one and move onto the next question.

所以你现在可以选择标题一，然后跳到下一个问题。

It could be heading number one.

可能是第一个标题。

The answer must be heading number one: How wildlife benefits from large trees.

野生动物如何从大树中获益。

Heading number two talks about 'benefits', so it could still be number two.

第二个标题是关于“益处”的，所以第二个还是有可能。

They aren’t, and so we can rule out heading number three.

它们没有，所以我们可以 划掉标题三。

Therefore, we can match heading number three to this paragraph.

所以，我们能够将标题三和这段话匹配。

At this point, we can say that it can’t be heading number two.

从这点来看，我们可以说 不能选标题二。

So, heading number three is looking more probable, because it talks about 'declining membership of trade unions'.

所以，第三个标题看起来更加可能，因为它说的是“公会成员数量的减少”。

We have a mention of trees, and the words' essential part' and 'successfully' could connect to the idea of 'benefits' in heading number one.

我们有一个提到了“树”，和“关键部分”以及“成功”，能够和第一个标题中的“获益”相联系。

The second sentence mentions 'benefits', which appears in heading number two, but this sentence says that people don't know the benefits of joining a trade union, which is a different context from heading number two.

第二个句子提到了“益处”，这在第二个标题中出现了，但是这个句子说人们并不知道加入工会的好处，这和第二个标题语境完全不同。