题目内容：

It is reported that______people in the word are suffering from the H1N1 flu
A.several thousands of
B.ten thousands
C.thousands of
D.thousands

优质解答

选C.
thousands of 是固定短语表示成千上万.没有A选项这种结构.
thousand前有数词时不能加s.
如B选项应该是ten thousand.表示十千 也就是一万.
thousands不能单独使用只能和of一起.