【题目】______ school playgrounds to the public makes exercise easier for the people in the community.
A.OpenB.OpenedC.OpeningD.Have opened
在线课程【答案】C
【解析】
考查非谓语动词。句意：学校操场对公众开放，使得社区里的人们锻炼起来更容易。______ school playgrounds to the public是句中主语，此处没有被动意思，用动名词做主语，故选C。