1.Copper was the first metal used by humans and is second only to
—————A ——B
iron into its utility through the ages
——C ————D
我同學跟我說答案是C錯,說要改成on?是這樣嗎?
B的話only不可以放在second前面嗎?
還有D,可以加the嗎?因為不是都說for ages之類的嗎??
有人可以幫我解答一下嗎?
2.Limestone long has been quarried for to use as a building stone.
—— ————— — ————
A B C D
我知道A是不對的,可是我不懂為啥B是對的?
不是for這個介係詞後面要加V-ing嗎?為啥不用加?改成being used之類的?
以上,希望各位高手幫忙一下!謝謝
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