问题补充：
soldiers and doctors have been in Wenchuan to help the people there.
A. Thousand of
B. Two thousands
C. Thousands of
D. Many thousands of
答案：
A. Thousand of
B. Two thousands
(答案→)C. Thousands of
D. Many thousands of
解析：本题考查数词。数词hundred, thousand, million等后面跟of 时，要变复数。排除A。thousand前接具体数字时，后面不能跟of,也不用复数形式，排除B。前面没有数字，thousand用复数，且其后用of。Many thousands of后接名词时，名词前要加the或物主代词。
