【正确答案】 A

【答案解析】[解析] 与名词proposal相关的名词性从句中要使用虚拟语气，例如：It was Jack's proposal that she return to competition, perhaps by Wimbledon in June. 杰克建议她在6月份举行的温布尔登网球公开赛之前就重返赛场。They presented a proposal that all workers be given free medical care. 他们提议所有的工人都应享受免费医疗。