31. A) enlightened B) enlighten

　　C) enlightening D) lightning

　　32. A) including B) include

　　C) included D) includes

　　33. A) bore B) endured

　　C) suffered D) subjected

　　34. A) to B) at

　　C) in D) with

　　35. A) explored B) imported

　　C) exposed D) exported

　　36. A) products B) produce

　　C) production D) providing

　　37. A) in B) with

　　C) at D) on

　　38. A) concern B) concerning

　　C) concerned D) concerns

　　39. A) devastated B) developed

　　C) deviled D) deduce

　　40. A) straightly B) indirectly

　　C) increasingly D) directly

　　41. A) inclusively B) mainly

　　C) specifically D) mostly

　　42. A) After all B) Moreover

　　C) Furthermore D) Beside

　　43. A) tested B) made

　　C) improved D) developed

　　44. A) asked B) required

　　C) rehearsed D) released

　　45. A) to B) for

　　C) in D) with

　　46. A) puts B) rises

　　C) raises D) lifts

　　47. A) at B) on

　　C) in D) by

　　48. A) sees B) seen

　　C) saw D) seeing

　　49. A) since B) even

　　C) yet D) still

　　50. A) reduced B) deduced

　　C) moved D) induced