cost as a factor in supply
in a purely competitive market, the supplier of goods and services has no control over the market price, because he produces too little to influence market conditions. with no difference between his products and the products___________ his competitors, he will sell nothing if he charges above the market price and he will sell all if he charges at or___________ the market price. however, in considering the price, he must take the___________ of production into consideration. there are times when he may be willing to sell below his cost. this might happen when prices tumble for___________ he believes will be a short time. however, no business person can ___________ to lose money for a prolonged period. he must be constantly ___________ of his costs in relation to the market price if he is to compete successfully and earn a profit.
many people have the impression that as production increases, costs per unit decrease. ___________ mass production has made this true in certain industries and at certain levels of production, ___________ logic and practical experiences have shown that costs per unit begin to rise beyond a certain level of production. some economists___________ to this principle as the law of increasing costs.
the reason costs rise as production goes up is ___________. however, it is easy to recognize that as production goes up, the need for additional factors of production will also grow, ___________ competitive bidding in the marketplace for the factors of production. if a producer needs ___________ skilled labor to produce more, and none of this labor is unemployed, the producer will have to get___________ from other sources. this can be done by___________ higher wages. higher bidding would also apply to the other factors of production. we must also recognize that not all labor is equally productive, ___________ not all land is equally fertile and not all ore is equally rich in the mineral wanted.
51 a to b at c of d on
52 a below b beneath c over d above
53 a price b cost c worth d profit
54 a that b why c what d if
55 a afford b pretend c offer d decide
56 a sure b afraid c aware d suspicious
57 a because b since c when d while
58 a both b neither c none d any
59 a resort b refer c turn d attend
60 a clear b simple c difficult d complex
61 a bringing b resulting in c including d carrying out
62 a less b numerous c more d many
63 a them b these c it d those
64 a offering b cutting c reducing d having
65 a as if b just as c because d while
参考答案：
51. c52. a53. b54. c55. a
56. c57. d58. a59. b60. d
61. b62. c63. c64. a65. b