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　　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