2. Choose the right verb forms.
1. Where is Jane? She (goes, went, has gone) to the shop an hour ago and she (didn't come, came, hasn't come) home yet.
2. I (am, was, have been) in Washington two years ago but I (am never, was never, have never been) to New York.
3. I (did, have done, do) my homework this morning.

1: 1) can you speak english well ?   2) the patient must stay in bed.  3) may i open the window and air the room?   4) can we keep our body in healthy condition?   5) we may/can treat many diseases by diet.  (may-возможно можем, can -точно можем)6) nobody can read or write latin.  7) you have a bad toothache. you must see a dentist.8) dust may have germs.  2: 1) вы должны брать эти порошки на голодный желудок. - you must take this powder on an empty stomach.  2) потеря крови может вызвать шок. -blood loss can lead to shock.3) можно войти, доктор ? - doctor, may i come in? 4) вы должны выполнять каждый день. - you must do exercises every day.5) студенты могут брать книги из библиотеки. - students can take books from the library.  6) можете ли вы делать инъекции ?   - can you do injections?   7) сестра должна дать грелку лежачиму больному.  - a nurse must give a hot water bottle to a bed-bound patient.  3: 1. who can  extract teeth painlessly? 2. must the nurse  be very careful with bed patients? 3. what can   pass through the mouth and nose? 4. what  can cause asphyxia?