(B.)The Savior of Baby Elephants       Rachael Murton, who is a 33-year-old British young female expert,   29   working hard in Africanforests for the past ten years on how to take care of baby elephants without their moms.       Those baby elephants lose their moms because their moms are taken away to do tricks or be killed. Itis common that dishonest businessmen kill the elephants to get their teeth. As usual, a female elephant   30   to an elephant or twins at a time. Then the baby elephants need their moms’ milk to grow untilthe age of two or three. Once they lose their moms, it is hard for them to live.
        Therefore, in order to take care of the baby elephants, Rachael   31   a nursinghome for them in 2012. Those baby elephants are raised well and they can return backto the wild when they get older and stronger. 

【題組】29.
(A) is
(B) has
(C) had kept
(D) has been