pp1-23

[amanikang]

23. (25773-!-item-!-188;#058&002128)

While they remove carbon dioxide from the air, conserve soil and water, and house thousands of species, forests also supply potentially valuable pharmaceuticals, and, as sources of building material and firewood, that provide employment for millions worldwide.

(A) pharmaceuticals, and, as sources of building material and firewood, that provide
(B) pharmaceuticals, and sources of building material and firewood, are providers of
(C) pharmaceuticals and, as sources of building material and firewood that are providing
(D) pharmaceuticals and sources of building material and firewood, for providing
(E) pharmaceuticals and, as sources of building material and firewood, provide

答案E
as 不是接句子嗎??

[dibert8]

as 可以當介係詞

(A) and 不平衡
(B) 流水句
(C) and 後面沒有句子
(D) 表目的用 to (i.e. to provide), 但即使改成 to 句意也不好.
(E) supply... and provide... 平衡

[Huang Hsin-Yi]

根據dibert8大大 E選項的解釋
(E) pharmaceuticals and, as sources of building material and firewood, provide

意思是as sources of building material and firewood 是補充資訊 可省略不看 是嗎
想請問 as 在這裡的作用是什麼

[dibert8]

as... 為介係詞片語,修飾 provide... 的子句.

[Huang Hsin-Yi]

23. (25773-!-item-!-188;#058&002128)

(D) pharmaceuticals and sources of building material and firewood, for providing

??

CDer說 pharmaceuticals and sources 改變句意,我是一直看不懂,倒是查了for providing的用法

for +ving=prep n/ing
you use for when you state or explain the purpose of an object,action,or activity.
ex:The knife for cutting sausage was sitting in the sink.

因此,for, 此處做"用來"解

因此D選項的句意有問題:
森林提供寶貴醫藥資源和建築用材料,是用來提供就業機會~~~~很怪巴