A．everB．neverC．longD．always

单项选择题

Medical experts have (26) suspected a link between the health of the mind and the health of the body. From time to time researchers have reported (27) of much a link. One such report now comes from the University of California at San Diego School of Medicine. The study shows that the mental disorder known as depression (28) to harm the body’s natural defense system against disease.
(29) of severe depression generally have a low opinion of themselves. They often lose (30) in everything. They seem vary sad. They have trouble (31) . And they generally lose their (32) to eat. In most extreme examples, depressed persons (33) want to kill themselves.
The University of California study was (34) by Dr. Michael Irwin. He began the study two years ago at a hospital in the city of Los Angeles. The study involved 37 women, (35) husbands were dying of lung cancer. Dr. Irwin studied the women for (36) of depression. He took some of their blood both before and after the death of their husbands. He examined the blood for (37) that help the body fight disease. These are the substances scientists call natural killer cells. T suppressor cells, and T helper cells. Dr. Irwin then looked for the same (38) of cells in the blood of women whose husbands (39) healthy. Dr. Irwin (40) that disease- fighting cells were not very active in the women whose husbands were dying or had just (41) . The rate of activity was (42) than in women whose husbands were healthy. Dr. Irwin also found that the rate of activity was (43) linked to the (44) of each woman’s depression (45) the death of her husband.

A．ever
B．never
C．long
D．always