单项选择题

According to the interviewee，what is the problem with the research？（）

A.The researchers can’t explain what leads to the finding.
B.Researchers only do the tests on one kind of bacteria.
C.The research is still in the stage of controlled lab tests.
D.There are still some flaws in the procedure of the research.

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单项选择题

Which of the following is TRUE about John Atta Mills？（）

A.He devoted himself in the fight of Ghana’s independence.
B.He contributed a lot to the stability of Ghana.
C.He was the first elected President of Ghana.
D.He became the President in December，2008.

单项选择题

According to the news item，researchers can predict a heart attack by（）

A.examining the plaques in the arteries.
B.testing the flow of blood.
C.consulting the high solution image of the heart and blood vessels.
D.referring to the disease history of the patients.