47. The word "metamorphose" in line 22 is closest in meaning to

　　(a) disappear

　　(b) grow

　　(c) change

　　(d) move

　　48. The word "they" in line 23 refers to

　　(a) flies

　　(b) maggots

　　(c) gangrene-causing bacteria

　　(d) live patients

　　49. All of the following are true EXCEPT

　　(a) maggots come from eggs

　　(b) maggots eat bacteria

　　(c) maggots are larvae

　　(d) William Bayer discovered a new type of maggot

　　50. What can be inferred from the passage about maggots?

　　(a) modern science might be able to develop new drugs from maggots that would fight infection

　　(b) maggot therapy would have been more popular if antibiotics had not been discovered

　　(c) William Baer later changed his mind about the value of using maggot therapy

　　(d) sulfa drugs were developed from maggots

　　Test 3- Answer Key

　　1.b 2.d 3.b 4.c 5.a 6.c 7.c 8.d 9.d 10.b

　　11.a 12.c 13.c 14.a 15.d 16.d 17.a 18.c 19.b 20.d

　　21.a 22.d 23.c 24.a 25.c 26.b 27.b 28.d 29.a 30.b

　　31.a 32.c 33.b 34.a 35.c 36.d 37.b 38.c 39.b 40.a

　　41.c 42.a 43.d 44.d 45.d 46.d 47.c 48.b 49.a 50.b