89.The instructor advised the students what the procedures to follow in writing the term paper
Cấu trúc : advised sb on st : khuyên ai đó về gì.
$\to \text{"why"} \to \text{"on"}$
90.Her father did not want her to make friends with Pete and Sally because they influenced on her badly, to his mind.
$\to \text{to his mind} \to \text{on his mind}$