The Smiths have gone to New York for their holiday with an old servant their house.A. lo

问题补充：

The Smiths have gone to New York for their holiday, with an old servant their house.

A. looking after

B. look after

C. having looked after

D. looked after

答案：

(答案→)A. looking after

B. look after

C. having looked after

D. looked after

解析：考查复合结构。An old servant与look after构成主动关系。所以使用现在分词形式，排除BD，本题没有完成形式。句意：斯密斯一家已经去了纽约度假，留一个年老的仆人照顾房子。