单选题
Doctors see a connection between increase amounts of leisure time spent______ and the increased number of cases of skin cancer.
A、
to sunbathe
B、
to have sunbathed
C、
having sunbathed
D、
sunbathing
【正确答案】
D
【答案解析】
此题考查非谓语动词的用法，spend 后应接动名词，本句意为：医生们注意到日光浴时间的增长和皮肤癌数量增长之间的关系。
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