Task 1.
1. -;
2. Do you come here ...?
3. Play
4. Leave
5. Sam doesn't know.
Task 2.
1. -
2. Did you watch...? / I didn't enjoy it
3. Did your neighbours...? / We helped
4. A train crashed.../ All the passegers survived
5. Susan didn't play
6. Did you see...? / We had...
Task 3.
1. -
2. Robots won't do most of the work
3. People will use electric cars
4. Pollution won't disappear