1. If we don't economise on electricity, there will be power cuts.

2. I hope he will finish his homework before we get back.

3. If we sit too far away from the screen I will not be able to see the film.

4. Listen to those people! What language are they speaking?

1 . If we ( not economise ) .. don't economise.. on electricity , there with be power cuts

2 . I hope he ( finish ) will finish.... his homework before we ( get ) .getting...... back

3 . If we sit too far away from the screen I ( not be ) won't be.... able to see the film

4 . Listen to those people ! What language they ( speak ) .are they speaking... ?