Заполните пропуски модальными глаголами can, could; may, might; must; should.
1. If you are ill you ... consult a physician and ... do what he says. 2. Since one pack of 20 cigarettes contains 30 mg of cadmium, it is possible that chronic inhalation of cigarette smoke ... lead to an en­hanced cadmium intake. 3. The patient who receives the blood of the diseased donor ... develop a positive test for the hepatitis antigen shortly iilter transfusion. 4. This patient had received 1 unit of blood at opera-lion and ... have viral hepatitis. 5. The patients with jaundice ... be Immediately transferred to an infectious hospital. 6. Sera from appar­ently healthy blood donors ... be always tested for the presence of hepatitits antigen.

1. If you are ill you should consult a physician and should do what he says.
Explanation: In this sentence, "should" is used to indicate that it is advisable or recommended for a person who is ill to consult a physician and follow their advice.

2. Since one pack of 20 cigarettes contains 30 mg of cadmium, it is possible that chronic inhalation of cigarette smoke might lead to an enhanced cadmium intake.
Explanation: "Might" is used to express a possibility that chronic inhalation of cigarette smoke could lead to an increased intake of cadmium.

3. The patient who receives the blood of the diseased donor may develop a positive test for the hepatitis antigen shortly after transfusion.
Explanation: "May" is used to express the possibility that a patient who receives blood from a diseased donor could develop a positive test for the hepatitis antigen soon after the transfusion.

4. This patient had received 1 unit of blood at operation and may have viral hepatitis.
Explanation: "May" is used to indicate the possibility that this patient could have viral hepatitis after receiving one unit of blood during the operation.

5. The patients with jaundice must be immediately transferred to an infectious hospital.
Explanation: "Must" is used to indicate a strong obligation or necessity for patients with jaundice to be transferred to an infectious hospital.

6. Sera from apparently healthy blood donors should always be tested for the presence of hepatitis antigen.
Explanation: "Should" is used to express a recommendation or necessity for sera from apparently healthy blood donors to be tested for the presence of hepatitis antigen.