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—Will people live to be 200 years old?  —____________.

A．No, they aren’t.    B．No, they won’t.    C．No, they don’t.    D．No, they can’t.

---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

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

—Will people live to be 200 years old?  —____________.

---Will people live to be 300 years old  ?

---  ______________  .