缺词填空。所填单词在题后横线上必须完整写出。

     Mr. Louis B. Russell (1)l______ in Indianapolis, a city in the state of Indiana. He seems (2)h______ and

strong. But he is a very (3)s______ person. Thanks to the wonderful discovery (发现) of (4)m______ science,

Mr. Russell was given a second (5)h______ a few years ago. Doctors are (6)a______ to give a new heart to

persons who (7)s______ from heart disease. The new heart is (8)t______ from a person who has just died.

The operation is not always (9)s______. Several people have (10)d______ after heart transplants (移植)

(11)b______ their bodies rejected (排斥) the new hearts. However, Mr Russell is one of those lucky

(12)o______.