The researcher who works in the Chinese Academy of Science gave us a quite （)lecture a

A.why

B.how

C.who

D.what

__________they who did the thorough cleaning to the classroom yesterday．

A．These were

B．That was

C．It was

D．Those were

Generations of Americans have been brought up to believe that a good breakfast is one life’s essentials. Eating

breakfast at the start of the day, we have all been told, and told again, is as necessary as putting gasoline in the

family car before starting a trip.

But for many people the thought of food first thing in the morning is by no means a pleasure. So despite all the

efforts, they still take no breakfast. Between 1977 and 1983, the latest year for which figures are available, the

number of people who didn’t have breakfast, increased by 33 percent.

For those who feel pain of guilt about not eating breakfast, however, there is some good news. Several studies

in the last few years indicate that, for adults especially, there may be nothing wrong with omitting breakfast.

“Going without breakfast does not affect performance,” said Arrold E. Bender, former professor of the nutrition

at Queen Elizabeth College in London, “nor does giving people breakfast improve performance.”

Scientific evidence linking breakfast to better health or better performance is surprisingly inadequate, and most

of the recent work involves children, not adults, “The literature”, says one researcher, Dr. Erresto at the University

of Texas, “is poor”.

The latest year for which figures could be obtained is _______.

A. the year the author wrote the article

B. 1977

C. any year between 1997 and 1983

D. 1983

健康计划的总体目标中的三个"W"指

A、who，what，when

B、what，when，why

C、who，what，which

D、what，when，where

E、when，where，which