下面句子数字用法错在哪里?After the game i heard the crowd was over twenty thousands.i got twenty-five from forty in my test.

问题描述:

下面句子数字用法错在哪里?
After the game i heard the crowd was over twenty thousands.
i got twenty-five from forty in my test.

第一句应该是twenty thousand,数词后面的thousand用单数
第二句改成25 of 40

twenty thousands用法中,thousand后不可以加s,twenty-five这种用法好像没有啊.