Answer
1. If Ben had a better computer, he would play computer games.
2. If he falls down the cliff, he will hurt himself.
3. If Lucy sings in the group, Jake will write a new song.
4. If the party is on Saturday, Emma will go there.
5. If the dress is red, Ben will give Lucy red flowers.
6. If the building is too high, I will take the lift.
7. If the car does not start, we will be late for school.
8. If the film is good, Jake and Ben will watch it again.
9. If someone attacks me, I will shout for help.
10. If he breaks his arm, they will take him to hospital.