A) may; b) must; c) should. 1. Lets wait for her. She (возможность) be on her way. 2. You (следовало) have started the treatment earlier. 3. You (нельзя) not smoke. 4. The doctor (должно быть) be making a round of the district. 5. Your sister often complains of a headache. She (следует) consult a neurologist. 6. This patient (возможно) have already undergone the necessary examination. 7. One (нужно) stay in bed and follow the prescribed treatment not to get complications. 8. (Можно) I listen to your heart? 9. You (должен) take the medicine regularly to be well again. 10. You (должен) begin to take care of your health from childhood.

1.may
2.should
3.must not
4.may
5.should
6.may
7.must
8.may
9.must
10.must