单项选择题
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A.She will be absent in the next class.
B.She will help the professor hand out the course outline.
C.She will copy the outline by herself.
D.She will go to the office of the professor.
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单项选择题
Which of the following statements is NOT true
A.It is necessary to reform health system to help overweight Americans.
B.It is necessary for students to strengthen their body and eat healthy food.
C.It is possible for American workers to have health care for free.
D.It is possible for all Americans to take part in physical activities and buy healthy foo
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单项选择题
The researchers are looking afterwards for ______.
A.the proteins to stop HIV virus
B.the blood of those who were vaccinated
C.the blood of those who were not vaccinated
D.the molecules that are more abundant in healthy people
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