Google launched its indoor maps feature in Singapore on Tuesday, the city state the second country in Asia to have it.
A. to make
B. make
C. making
D. having made
网友回答
A. to make
B. make
(答案→)C. making
D. having made
解析：make与其逻辑主语Google之间是主动关系，故用现在分词作结果状语，且和谓语动词的动作不存在时间上的先后关系，故用现在分词的一般式，故选C。