Having lost all their _____ in a big fire, the Blacks had to depend on their friends and relatives for a living.

There was a tall boy sitting in front of me, blocking my _____ completely.

I listened to Dr．Wilson's lecture about the protection of wild animals, but I was unable to grasp its key     .

 I bought a new type of cell-phone, which was the ____ of all my classmates.

Tom has a (n)      for language，while his sister is a born pianist