A.heart problems and air quality | B.heart problems and exercising |
C.heart problems and smoking | D.heart problems and fatty food |
A.relatively high | B.extremely low |
C.relatively low | D.extremely high |
A.eating fatty food has immediate effects on your heart. |
B.the EPA conducted many studies on air quality. |
C.moderate air quality is more harmful than smoking. |
D.stricter regulations on pollutants should be made. |
A.inform | B.persuade |
C.describe | D.entertain |