[C] Although pancreas transplants are reliable, many diabetics are reluctant to undergo the operation because of the side effects of immunosuppressive drugs.

　　[D] Although pancreas transplants alone are not generally successful, the operation can be used in conjunction with other procedures to treat diabetes.

　　2. According to the text, widely spaced doses of insulin can cause

　　[A] reversal of normal kidney function.

　　[B] delay in the onset of diabetes.

　　[C] radical changes in the concentration of blood glucose.

　　[D] restoration of normoglycemia.

　　3. According to the text, a periodic high concentration of blood glucose in diabetics is a possible cause of

　　[A] deterioration of the pancreas.

　　[B] damage to the eyes and kidneys.

　　[C] rejection of transplanted organs.

　　[D] inadequate secretion of insulin.

　　4. It can be inferred from the text that one of the important contributing causes of the failure of most pancreas transplants has been the

　　[A] reluctance of patients to cooperate with physicians.

　　[B] imperfect techniques used in the operation.

　　[C] scarcity of immunosuppressive drugs.

　　[D] weakened condition of the patients.

　　5. The text suggests that the author considers the data concerning the success of pancreas transplants to be

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