问题
选择题
Which do you enjoy ____ your spare time, surfing the Internet or building up your strength?
A．to spend
B．spend
C．spending
D．to spending
答案
答案：A
考查非谓语动词。此处使用不定式表示目的，enjoy的宾语是surfing the Internet or building up your strength，即为了度过你的空余时间，选A。