1. It is said that the custom of shaking hands originated when primitive men held out empty hands to indicate that they had no ______ weapons and were thus amicably disposed. A. lethal B. concealed C. murderous D. secret
2. It is generally thought that as teachers work with students, psychology course work is ______to teacher-training. A. indispensable B. inviolate C. indisposed D. invariably
