Everyone is s____to keep our classroom clean and tidy

问题描述:

Everyone is s____to keep our classroom clean and tidy

估计是said,被告知。
毕竟是中学生,不可能有太高深的词。

填supposed。be supposed to do=should do

supposed
意思是每个人都应该保持我们教室的干净和整洁.

sick