The teacher w that these problrms might be too hard for her studentsw后面一个w打头的单词,

The teacher w that these problrms might be too hard for her students
w后面一个w打头的单词,

warned 警告说
老师警告说那些问题对于她的学生们来说太难了.
供参考.

worried 担心

worried 担心 老师担心这些问题对学生来说太难了