45 сделайье .1)we have five lessons (in, on, at)the timetable on monday.2)maths and russian are difficult (subjects, pointers, reports3)my brother has art (once, twice in , twice a) week.4)dancinq is ann's favourite subject, (is it, isn't it , isn't she)? 5)my friend is very good (at, with)english. 6)how many lessons (does, will, did) your sister have yesterday? 7)my dad (can, may , must)play chess very well.8)(should, must, may)i come in? i'm sorry. i 'm late.9)she (hasn't to, doesn't have to, doesn't have)get up early today. it's sunday.10)nick(has a stomachache, has a toothache, caught a cold). he is coughing and sheezing.11)mike, you are so slow. i'm sure you (will be, will, won't be) late.12)kate, you ( shouldn't be, should, should be)polite and friendly.

1. in
2. subjects
3. twice a
4. isn`t it
5. at
6. did
7. can
8. may
9. doesn`t have to
10. caught a cold
11. will be
12. should be

Smoking is dengerous to your health

Is smoking dengerous to your health ?Is smoking dangerous or safe to your health? Why is smoking dangerous for your health? Smoking is dangerous for your health, isn't it?What is dangerous for youe heath?

They still make a lot of mistakes  

1. Do they still make a lot of mistakes?

2. Do they still make a lot or a few of mistakes?

3. Why do they still make a lot of mistakes?

4. They still make a lot of mistakes, don’t they?

5. Who still makes a lot of mistakes?

I will meet you at three o'clock tomorrow  

1. Shall (Will) I meet you at three o'clock tomorrow?

2. Shall (Will) I meet you at three or at two o'clock tomorrow?

3. What time Shall (Will) I meet you tomotrrow?

4. Shall (Will) I meet you at three o'clock tomorrow, shan’t I? ( won’t I ?)

5. Who will  meet you at three o'clock tomorrow?

Объяснение:

В 3 предложении уместнее будет shall на мой взгляд, но с will  не будет ошибкой тоже.

2. They must be out.

3. Drivers mus not stop on the motorway.

4. She should stay home for a few days.

5. They didn't have to ignore her.

6. You didn't have to bring the umbrella.

7. It's likely that they will go on holiday to Cornwall.

8. She can walk to school  now that she lives nearby.

9. Pete might have left it behind earlier.

10 They had to go through the body scanner at Manchester Airport.

11. You aren't allowed to talk during the exam.

12. She has lied to you.

13. He didn't need to drive me to the station.

14. Janet was able to win the race.

15. You had to deny her go.