问题补充：
people in the world are suffering from the H1N1 flu.
A. Several thousands of
B. Ten thousands
C. Thousands of
D. Thousands
答案：
A. Several thousands of
B. Ten thousands
(答案→)C. Thousands of
D. Thousands
解析：此题重点考查数量的表达方法。thousand前有数词修饰时，后面不能用复数，没有数词时，可用短语thousands of 成千上万的。故选C。
