1. He has pointed out that the tree is a useful source of income，as tourists have been coming from all parts the country to see it.
他指出，因为人们从全国各地纷纷前来参观这棵树，它成了一个有用的财源。
知识点：as引导原因状语从句，to see it动询不定式作目的状语。
真题检验：for引导原因状语从句
He found it increasingly difficult to read, his eyesight was beginning to fail.
A. and B. for C. but D. or
答案：选B
分析：for在此引导原因状语从句，解释前一句话的原因。
翻译：因为视力开始下降，他发现阅读越来越困难了。
2. Because the tree was mentioned in a newspaper, the number of visitors to Frinley has now increased.
就因为报纸上报道过这棵树，所以现在到弗林利参观的人越来越多了。
知识点：was mentioned = was reported 被报道
3. It is said that if anyone touches the tree, he will have bad luck; if he picks a leaf, he will die.
据说，谁要是触摸了这棵树，就会交上恶运；如果谁摘了一片树叶，就会死去。
知识点：it is said 据说
真題检验：主语 + be is said to do
AIDS is said the biggest health challenge to both men and women in that area over the past few years.
A. that it is B. to be C. that it has been D. to have been
答案：选D
分析：It is said that从句可转为sb. / sth. be said to do的形式。由此可排除A、C两项，由 时间状语over the past few years可知要用完成时，所以排除B项。
翻译：在过去的几年中，艾滋病对那个地区的男女来说是最大的健康挑战。
