阅读理解。 People are more likely to wash th

问题：

阅读理解。

     People are more likely to wash their hands properly after using the toilet if they are shamed into it

or think they are being watched, scientists said on Thursday.

     Hand-washing is the cheapest way of controlling disease but less than one third of men and two

thirds of women wash their hands with soap after going to the toilet, a British study by the London

School of Hygiene and Tropical Medicine showed.

     But when prompted by an electronic message flashing up on a board asking: "Is the person next

to you washing with soap?," around 12 percent more men and 11 percent more women used soap.

     Health authorities around the world are stepping up efforts to persuade people to be more hygienic

and wash their hands properly to help slow the spread of H1N1 swine flu, which was declared a

pandemic(大流行病) by the World Health Organization in June.

     "Hand-washing with soap has been ranked the most effective way for the worldwide control of

disease," the study's authors wrote.

     "It could save more than a million lives a year from diarrheal diseases, and prevent respiratory

(呼吸) infections -- the biggest causes of child mortality(死亡) in developing countries."

      In developed nations, hand-washing can help prevent the spread of viral infections like flu and

sickness and diarrhea bugs like norovirus and rotavirus, as well as hospital-acquired infections like

MRSA and C-difficile, the authors said.

     The researchers studied the behavior of a quarter of a million people using toilets at motorway

service stations in Britain over 32 days．Use of soap was monitored by sensors.

     The study, published in the American Journal of Public Health to mark Global Hand-washing

Day, showed that with no reminders, 32 percent of men and 64 percent of women used soap.

1．In which of the following situation can people wash their hands properly?

A．After they going to toilet．

B．when they think they are being watched.

C．When they think their hands are dirty.

D．When they find soap nearby.

2．Which of the following is the main advantage of hand-washing?

A．people can always get their hands clean．

B．People can save a lot of time and water．

C．It is the cheapest way of controlling disease.

D．It wastes no any time and energy.

3．What is the biggest cause of child death in developing countries?

A．respiratory infections．

B．diarrheal diseases．

C．H1N1 swine flu．

D．hospital-acquired infections.

4．Which of the following is true according to the seventh paragraph?

A．Hand-washing is popular in the developed countries.

B．They authorities persuaded the people to wash their hands daily.

C．More and more people know to wash their hands properly.

D．The spread of viral infections is a serious problem.

5．We can conclude from the passage that _______.

A．Most people wash their hands after going to toilet.

B．Many people can not wash their hands properly.

C．Few people know Global Hand-washing Day.

D．H1N1 swine flu was declared a pandemic.