Generations of Americans have been brought【C1】______to believe that a good breakfast is im

portant for health. Eating breakfast at the【C2】______of the day, we have all been【C3】______, is as necessary as putting gasoline in the family car【C4】______starting a trip.

But for many people the thought of food first in the morning is by【C5】______pleasure. So【C6】______all the efforts, they still take no【C7】______. Between 1978 and l983, the latest year for which figures are【C8】______, the number of people who didn't have breakfast increased【C9】______33 percent—from 8. 8 million to 11. 7 million【C10】______the Chinese-based Market Research Corporation of America.

For those who feel pain of【C11】______about not having breakfast,【C12】______, there is some good news. Several studies in the last few years【C13】______that, for adults especially, there may be nothing【C14】______with omitting break fast. "Going【C15】______breakfast does not affect【C16】______. " Said Arnold E. Bendoer, former professor of nutrition at Queen Elizabeth College in London,【C17】______does giving people breakfast improve performance.

【C18】______evidence relating breakfast to better health or【C19】______performance is surprisingly inadequate, and most of the recent work involves children, not【C20】______. "The literature, "says one researcher, Dr. Ernesto Pollitt at the University of Texas, "is poor. "

【C1】

A．about

B．into

C．up

D．from