we have used the paper for many c( ).it was one of the most useful inventions
题目
we have used the paper for many c( ).it was one of the most useful inventions
答案
应该填 centuries ,用century (世纪)的复数形式.
纸我们已经用了好多个世纪了,它是最有用的发明之一.
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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