试题正文
Americans now recycle far more than they used to
because
选择一项：
a.
they want to make a profit from recycling.
b.
they produce more rubbish than other countries.
c.
they need more aluminium.
d.
they are competing with Germany.
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Ваш ответ верный.
正确答案是：they produce more rubbish than other countries.