to sun, rain and wind for a long time, the stone split（裂开）.
A. Being exposed
B. Having exposed
C. Exposed
D. To expose
网友回答
A. Being exposed
B. Having exposed
(答案→)C. Exposed
D. To expose
解析：考查分词用法。The stone与Expose，构成被动关系，故使用过去份被动被动。排除BD。A项表示正在被暴露，本题不强调正在进行。句意：长时间被暴露在阳光，雨水和大风之中，这块石头裂开了。故C正确。