单选题 Once you have had the disease, you are ______to it for the rest of your life, which means that you cannot get it again.

【正确答案】 B

【答案解析】这句话的意思是说，一旦你得过这种病，你今后就有了免疫力，这就意味着你就不会再得这种病了。(A)exempt被免除的；(B)immune免疫的；(C)unaffected未受影响的；(D)insusceptible不为所动的、无感觉的。