—Will people live to be 300 years old?— .A. No they aren’t B. No they won’tC. No they d

问题补充：

—Will people live to be 300 years old?— .

A. No, they aren’t

B. No, they won’t

C. No, they don’t

D. No, they can’t

答案：

A. No, they aren’t

(答案→)B. No, they won’t

C. No, they don’t

D. No, they can’t

解析：考察一般疑问句。英语中一般疑问句的简略回答，一般要与问句保持人称，数和时态的一致。根据上文时态为将来时态，可知答语中也要用将来时态，won’t=will not，故选B.