另有一道幾個選項分離湧現了unlike, while 之類的，然則這幾個我都沒選，那題應當是考比較的;
相幹常識點
a.強比較：Recently implemented "shift-work equations" based on studies of the human sleep cycle have reduced sickness, sleeping on the job, and fatigue among shift workers while raising production efficiency in various industries.
b.妥協：While all states face similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determine the types and amounts of waste produced, as well as the cost of disposal.
相似考題
In January 1994 an oil barge ran aground off the coast of San Juan, Puerto Rico, leaking its cargo of 750,000 gallons into the ocean, while causing the pollution of the city’s beaches.
A.leaking its cargo of 750,000 gallons into the ocean, while causing the pollution of
B.with its cargo of 750,000 gallons leaking into the ocean, and it pollutedC.and its cargo of 750,000 gallons leaked into the ocean, pollutingD.while it leaked its cargo of 750,000 gallons into the ocean and caused the pollution of
E.so that its cargo of 750,000 gallons leaked into the ocean, and they were polluting
After several years of rapid growth, the healthy care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.
A.while it then proved unable to handle the increase in business, falling months behind in its payment toB.while it then proved unable to handle the increase in business and fell months behind in its payment toC.but then it proved unable to handle the increase in business, falling months behind in its payingD.but then proving unable to handle the increase in business, falling months behind in payingE.but then proved unable to handle the increase in business, falling months behind in paying
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