单选题 One warning was ______ to stop her doing it.
【正确答案】 D
【答案解析】本题考查动词辨析。provide“供给，预防，防备”；suffer“遭受”；suffice“足够，满足…的需要”；suggest“建议”。句意为：一个警告阻止了她做这件事。