问题补充：
After the earthquake,soldiers went to Sichuan to help the people there.
A. two thousands
B. thousand of
C. thousands of
D. thousands
答案：
A. two thousands
B. thousand of
(答案→)C. thousands of
D. thousands
解析：句意：地震之后，数以千计的士兵赶赴四川去帮助那里的人们。当thousand前有基数词时，thousand用单数形式，thousand表示概数的时候用复数形式，并且后面要跟of，因此选C。
