71. Fewer and fewer of today‘s workers expect to spend their working lives in the same field， ______ the same company.

　　A. all else

　　B. much worse

　　C. let alone

　　D. less likely

　　正确答案是

　　72. Flying in an airplane was once thought to be an impossible ______.

　　A. task

　　B. profession

　　C. promise

　　D. contest

　　正确答案是

　　73. Fresh vegetables are straight from the ______ and raw vegetables are ______.

　　A. earth……cooked

　　B. soil……uncooked

　　C. floor……cooked

　　D. ground……uncooked

　　正确答案是

　　74. From this material we can _____ hundreds of what you may call direct products.

　　A. derive

　　B. discern

　　C. diminish

　　D. displace

　　正确答案是/74_）

　　75. Fruit is cheapest _____ season.

　　A. at

　　B. on

　　C. in

　　D. through

　　正确答案是

　　76. Fruit pickers are paid at the _____ of ‘4.00 an hour.

　　A. rate

　　B. scale

　　C. sum

　　D. value

　　正确答案是

　　77. Fumes from the exhaust of an automobile are ______.

　　A. notorious

　　B. anxious

　　C. noxious

　　D. delicious

　　正确答案是

　　78. George wasn‘t in class today， Professor Brown excused him ______.

　　A. from attending

　　B. of attending

　　C. to attend

　　D. attending

　　正确答案是

　　79. Class will _____ at a high temperature and will be in a liquid condition.

　　A. dissolve

　　B. disappear

　　C. melt

　　D. evaporate

　　正确答案是

　　80. Hamlet _____ his father‘s death on his uncle.

　　A. reversed

　　B. reverted

　　C. revenged

　　D. revealed

　　正确答案是