Whether you believe it or not it is that causes your illness.A. due to your overweightB.

问题补充：

Whether you believe it or not, it is that causes your illness.

A. due to your overweight

B. because you are overweight

C. you are overweight

D. your being overweight

答案：

A. due to your overweight

B. because you are overweight

C. you are overweight

(答案→)D. your being overweight

解析： 考查强调句型，此题强调的是主语，A、B、C三项都不能做主语，所以选D，动词名短语做主语，句意：是否你信还是不信，就是你的体重超重引起了你的疾病。