单选题 Many a professor ______ looking forward to visiting Korea at present.
A. is B. are C. was D. were

【正确答案】 A
【答案解析】考查主谓一致。主语是“many a+可数名词单数”表达的虽然是复数意义(相当于“many+可数名词复数”)，但其谓语仍应用第三人称单数形式。