题目内容：

    Australia and New Zealand’s health organizations have given their advice on when to use sunscreen (防晒霜), suggesting Australians apply it every day to avoid bad health effects.

A Sunscreen Summit took place in the Australian State of Queensland. During the summit, representatives from some of Australia’s leading research, medical and public health organizations examined the evidence on sunscreen use and determined that in most parts of the country it is beneficial to apply sunscreen every day.

“Up until now, public health organizations have recommended applying sunscreen ahead of planned outdoor activities but haven t recommended applying it every day as part of a morning routine (惯例),” professor Rachel Neale from QIMR Berghofer Medical Research Institute said. “In recent years, it has become clear that the DNA damage causes skin cancer and melanoma(黑色素瘤), which is caused by repeated small exposure to sunlight over a period of time,” Neale said. “In Australia, we get a lot of sun exposure from everyday activities such as alking to the bus stop or train station,” Neale said.

A study showed that one in two Australians believed it was unhealthy and potentially dangerous to use sunscreen every day. However, Terry Slevin from the Public Health Association of Australia says it is wrong. “There is consistent and compelling evidence that sunscreens are safe,” Slevin said. “Importantly, medical trials have found that people who use sunscreen daily have the same levels of vitamin d as those who don’t,” Slevin added.

Australia has one of the highest rates of skin cancer in the world which is made worse by the country’s close to Antarctica where there is a hole in the ozone layer (臭氧层), letting in higher numbers of UV rays.

1.What made Australian health organizations advise Australians to use sunscreen?

A.The makers of sunscreen.

B.Australian government.

C.The Sunscreen Summit.

D.New Zealand’s researchers.

2.What is not recommended before the Sunscreen Summit?

A.Using sunscreen before outdoor activities.

B.Using sunscreen as a morning routine.

C.Reducing the use of sunscreen.

D.Reducing outdoor activities.

3.What is the misunderstanding of many Australians?

A.People using sunscreen won’t have skin cancer.

B.Sunscreen will never take effect.

C.People using sunscreen have the same levels of vitamin

D.D. Sunscreen is bad for people’s health.

4.Which of the following best explains “compelling” underlined in paragraph 4?

A.Interesting. B.Disappointing.

C.Boring. D.Convincing.