Outdoor activities are as much a part of childhood for this generation of Chinese children as they for their parents and grandparents.
A. are
B. will be
C. were
D. have been
网友回答
A. are
B. will be
(答案→)C. were
D. have been
解析：句意：对于这一代中国孩子来说，他们像他们的父母和祖父一样，户外活动在童年中扮演着很重要的角色。表示过去发生的事情，用一般过去时，选C。