题目内容：

    Cancer is now the leading cause of death in wealthy countries. Researchers say cancer has replaced heart disease as the top killer in the industrial world.

If the trend continues, they predict cancer could become the leading cause of death worldwide later in this century. However, the news is not that deaths from cancer are increasing but that deaths from CVD（心血管疾病）are decreasing.

CVD is a group of medical conditions that include heart failure, heart attack and stroke. It remains the leading cause of death among middle-aged adults worldwide.

But when you only look at deaths in the industrial world - that is not the case. In those countries, the new report shows that cancer now kills two times as many people as CVD.

The findings were published in The Lancet, The research comes from a large, ongoing study called PURE. It is a project of the Population Health Research Institute of McMaster University and Hamilton Health Sciences in Canada.

The PURE researchers have been collecting information about people from over 20 high-, middle- and low-income countries. The data includes a person's medical history and individual behavior, such as physical activity and diet.

Salim Yusuf is a researcher on the PURE study and a professor of medicine at McMaster University. He also serves as head of the Population Health Research Institute. He explained the study's findings in a statement to the press.

“ The fact that deaths from cancer are now twice as frequent as deaths from CVD in high-income countries, ” Yusuf said,” shows a change in the main cause of death in middle-aged people. ” He added, “ As deaths from CVD decline（减少）in many countries because of prevention and treatment, cancer will likely become the leading cause of death globally in the future.”

1.What does the underlined word “decreasing” mean in Paragraph 2?

A.Falling. B.Lighting. C.Adding. D.Changing.

2.Which of the following is TRUE according to the passage?

A.Cancer has become the leading cause of death around the world.

B.CVD is still the main cause of death among middle-aged adults.

C.Prevention and treatment have helped to make deaths from cancer decline.

D.CVD has replaced cancer as the top killer in the wealthy countries.

3.What can we infer from the last sentence of the passage?

A.There will be no deaths from CVD in the future.

B.Deaths from CVD are the most in high-income countries.

C.Cancer will likely kill more people than CVD will do globally in the future.

D.Most middle-aged people in the world die from CVD.

4.What can we know about PURE from the passage?

A.PURE is a name of a group of researchers from high-income countries.

B.PURE is a project of the Population Health Research Institute of McMaster University and Hamilton Health Sciences in Canada.

C.PURE researchers only study a person's individual behavior.

D.PURE researchers have been collecting information about people from middle-income countries.