问题补充:
There are about teachers and students in their school.
A. three thousands
B. three thousand
C. thousand of
D. three thousand of
答案:
A. three thousands
(答案→)B. three thousand
C. thousand of
D. three thousand of
解析:英语中数词表示概数时,后面加s,和介词of搭配使用。用原形时表示具体数字和数词搭配使用。句意:在他们学校大约有三百老师。结合语境可知本句表示具体数字,故选B。