Question

Porink

②が正解なのですが、④が不正解になる理由が分かりませんでした。詳しく教えてください！

4 Rare Metals
0 They are very rare kinds of precious metals.
They are a necessary resource for modern technology.
Now, China is the only country to produce them.
Japan now mines them without harming the environment.
Script
“Rare earth metals" are not actually very rare, and while they are not categorized ae
“precious metals"” along with gold, silver and platinum, they are essential in the
production of everything from light bulbs to hybrid cars. At present, nearly all the rare
earth metals used by various industries come from China, but in 2009 that countrv
drastically reduced its exports of those metals. Fortunately, a Japanese scientist has
found huge deposits of these metals in deep-sea mud. He believes these could be mined
relatively easily without harming the environment, which would be of great benefit to
Japanese industry.
Question
Which statement is true about “rare earth metals'”?
読み上げ文中の they are essential in the production of everything from light bulbs
to hybrid cars より, レアメタルが現代の科学技術を用いた製品を作る場合に必要不
Point
可欠であることがわかる。

Answer 1

✨ ベストアンサー ✨

るぅ

light bulbsがmodern technologyかなと突っ込みたくなりますが、それはさておき④
この文は、日本が現在すでにmineしていることになります。
本文を見てみると、黄色でマークされているようにcould や、次の行にあるwouldがあります。これは可能性を話しています。可能性の段階なので、まだ実際にはmineしていません。
よって、④は不正解になります。