想要语法满分吗？做一下测测看

1. Students in the metropolitan school district lack math skills to such a large degree as to make it difficult to absorb them into a city economy becoming ever more dependent on information-based industries.

(a)lack math skills to such a large degree as to make it difficult to absorb them into a city economy becoming

(e)are so lacking in math skills that it will be difficult to absorb them into a city economy becoming

原文改错的地方的考点是什么？

2.Teratomas are unusual forms of cancer because they are composed of tissues such as tooth and bone not normally found in the organ in which the tumor appears.

(e)in that they are composed of tissues such as tooth and bone, tissues 这是正确答案，但为什么还有复杂的多加一个tissues呢？这里的考点规律是什么啊？

1. as to的主语必须一致, 而so that没有这个要求;

2.not normally found in the organ,是修饰前面的tissues的,而不是修饰bone,所以为了避免混淆,特意把tissues又提出来.

我是这样理解的：

such as 举例

like比较

虽然两者翻译成中文意思会差不多，但用法不一样。