1,2,3упражнений сделайте пожалуйста, СРОЧНО !спасибо заранее! ))

1 упражнение1) Can2) Must3) May4) Must5) May6) Can7) Must8) May2 упражнение1) You must consume these powders while you have an empty stomach. 2) The effusion of blood may cause a shock. 3) May I come in, doctor?4) You must do morning exerсises each day.5) Students may take books from the library.6) Can you do the injection? 7) The nurse has to give  a warmer to a bed patient.3 упражнение1) Who can extract teeth painleesly?2) Who has to be very careful with bed patients?3) How can the infection diseases pass through the mouth and nose?4) What can poisons cause?