Question

In our city, _______ middle school students want to work as a teacher in the future.

A．thousand	B．thousand of
C．thousands of	D．two thousand of

Answer 1

C

hundred 、thousand这些量词前面有数字的，如two thousand ，thousand后面绝不能加s;，表示具体数字。如果后面加s，前面则不能有数字，表示一个模糊地数字概念。
根据题意这里中学生数量是概数,故选C,成千上万的.