问题
选择题
—What do you think has caused his heart attack?
—It is ______.
A．because of his overweight
B．due to his being overweight
C．his being overweight
D．he is so overweight
答案
答案：C
题目分析：考查情景交际和省略。句意：--你认为是什么导致他心脏病发作？--是超重（导致了心脏病发作）。do you think是插入语，可忽略；问的是心脏病发作的原因，答语保留了主语，而省略了has caused his heart attack。故选C。