She asked that she ______ allowed to see her son in police custody.
【正确答案】 C
【答案解析】ask作“请求,要求”讲时,其后的宾语从句要用虚拟语气,从句谓语动词使用“(should+)动词原形”。类似用法的动词还有demand,suggest,order,require,desire,surprise等等。