1.For many patients, institutional care is the most ______ and beneficial form of care.

　　A) pertinent

　　B) appropriate

　　C) acute

　　D) persistent

　　2.Among all the changes resulting from the ______ entry of women into the work force, the transformation that has occurred in the women themselves is not the least important.

　　A) massive

　　B) quantitative

　　C) surplus

　　D) formidable

　　3.Mr. Smith became very ______ when it was suggested that he had made a mistake.

　　A) ingenious

　　B) empirical

　　C) objective

　　D) indignant

　　4.Rumours are everywhere, spreading fear, damaging reputations, and turning calm situations into ______ ones.

　　A) turbulent

　　B) tragic

　　C) vulnerable

　　D) suspicious

　　5.The ______ cycle of life and death is a subject of interest to scientists and philosophers alike.

　　A) incompatible

　　B) exceeding

　　C) instantaneous

　　D) eternal