36. The ______ at the military academy is so rigid that students can hardly bear it.

A) convention       B) confinement      C) principle              D) discipline

 37. The test results are beyond______; they have been repeated in labs all over the world.

A) negotiation       B) conflict         C) bargain                D) dispute

 38. I was so ______in today’s history lesson. I didn’t understand a thing.

A) amazed          B) neglected       C) confused               D) amused

 39. It ______ you to at least 50% off the regular price of either frames or lenses when you buy both.

A) presents          B) entitles         C) credits                 D) tips

 40. Deserts and high mountains have always been a ______ to the movement of people from place to place.

A) barrier           B) fence          C) prevention              D) jam

36. D) discipline  37. D) dispute    38.C) confused  39. B) entitles    40. A) barrier