问题补充：
Which do you enjoy your spare time, playing cards at home or taking a walk in the park?
A. spending
B. to spend
C. having spent
D. to have spent
答案：
A. spending
(答案→)B. to spend
C. having spent
D. to have spent
解析：考察非谓语动词.句意:你喜欢怎样度过你的业余时间,在家打扑克还是在公园散步?不定式做宾语表示具体的将要进行的动作,如果不定式动作发生在主语谓语动作之前,则要用完成时态的不定式,结合语境可知选B.
