Why were you upset? The headteacher wasn’t blaming anyone. He         said things like that could be avoided. 

Medicine depends on other fields for basic information, particularly some of their specialized branches.

 Jogging is an effective way to keep fit. _____ , swimming is helpful for bodybuilding.

"I wish you’d look at me when I'm trying to speak to you!" the teacher said      .

He began to take political science        only when he left school.