This is the only one of the ancient customers that ( )down in this area up to now.

题目

This is the only one of the ancient customers that ( )down in this area up to now.
答案给的是has been passed.我不明白为什么that修饰的是the only one.是不是of的原因呢.
另外还有一道题：In the south of China large amounts of bamboo (_)paper as well as farming tools .
答案是are used to make.一类题的吧.是不是因为of呢?

答案

句型所在
the only/just one of + 名词的复数 谓语动词只能用单数.因为是唯一的.
amounts是复数,决定后面的谓语动词是复数.
很高兴为你解答!
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