单选题 I"m a nervous wreck. We applied for a mortgage loan last week, and they ______ let us know this morning if it had been approved.

【正确答案】 A

【答案解析】[解析] 句意：我现在紧张死了，上星期我申请了抵押贷款，如果得到了批准，今天早上他们应该告诉我。were supposed to sth.应该做某事。根据上下文，与过去动作相反，用虚拟语气，所以A项正确。