1.
1. already
2. since
3. by the time
4. ever
5. how long
2.
1. was answered
2. is played
3. are gathered
4. were burnt
5. will be finished
3.
1. where is the city centre?
2. how is your mother?
3. are we late for the class?
4. is this your coat?
5. where does Kate live?
6. when will we visit our grandmother?
4.
1. are they at home now?
2. did James play chess with his friend yesterday?
3. was he waiting for me from 4 till 6 yesterday?
4. is mary speaking on the phone now?