2) When our plane lands at Glasgow Airport, we'll phone you.
3) If we don't stop hunting tigers, they'll be extinct in 20 years' time.
4) When the weather gets cold, birds fly to the south.
5) My dad will buy me a new laptop, if I help him paint the house.
6) If you feel hungry later, have a banana or an apple.
7) Unless there's a problem with train, I'll be there at 11 o'clock.
8) Unless the bus comes soon, I'm going to take a taxi.