In the question below choose the expression or word which best completes each sentence:
The chairman of the state school board has advised students to desist ..... blackmailing college authorities

In the question bellow choose the expression or word which best completes each sentence:
The principal remarked that it was the high standard of discipline that was instrumental .... the high percentage of passes in the school

In the question bellow choose the expression or word which best completes each sentence:
She wounded the man ... the back with her knitting needle