C．Unbelievable. D．Ordinary.

26．When interviewing Ebola survivors，the author .

A．couldn't touch them with hands

B．kept comforting them with hands

C．held their hands to show sympathy

D．couldn't help comforting them with hands

27．Ibrahim Koroma values his certificate because it .

A．is a sign of his contributions

B．shows he is a healthy person

C．has been the only one for him so far

D．is a great honor to have it in his village

28．We can learn from the passage that .

A．Ebola can only survive a few days

B．Ibrahim's neighbours treat him badly

C．Ebola still influences Ibrahim's life

D．there were once 17 people in Ibrahim's family

25-28.CABC

　　　　　　　　　　　　　　　C

Biologist Robert Pitman and his colleagues tracked orcas，or killer whales，and humpback whales off the coast of Western Australia. To research further，the scientists attached a tracker to a female orca，which allowed