单选题 The doctor advised that Mr. Malan ______ an operation right away so as to save his life.
【正确答案】 C
【答案解析】[解析] 本题测试advise引导宾语从句的用法，从句要用虚拟语气，形式为“(should)+动词原形”。类似的动词还有：suggest，insist， order等。