—What made Tom so sad? — .
A. His bicycle had been stolen
B. His bicycle to be stolen
C. His bicycle’s being stolen
D. His bicycle was stolen
网友回答
A. His bicycle had been stolen
B. His bicycle to be stolen
(答案→)C. His bicycle’s being stolen
D. His bicycle was stolen
解析：考查动名词做主语：句意：--什么使汤姆这么难过？--他的自行车被偷了。答语是省略句，省略了made Tom so sad，说明前面是主语，用动名词，his bicycle‘s是逻辑主语，而且和steal是被动关系，选C。