The extinction of the dinosaurs

Conditionals. Home exercises.

1 Put the verbs in brackets into appropriate forms using different types of conditional sentences.

1. Why didn’t you phone? If I had known you were coming, I (meet) you at the airport.
2. It’s a pity you missed the party. You would have met my friends from Hungary if you (come).
3. If we (have) some tools, we would be able to repair the car, but we haven’t got any with us.
4. I wouldn’t have passed the exam last week if you (not help) me.
5. If it (not snow) now, we could go to school.
6. If Mark trained harder, he (be) a good runner.
7. If Claire (listen) to her mother, she wouldn’t have married David in the first place.
8. I’m sure your letter hasn’t arrived yet. If it had come, I’m sure I (notice) it.
9. I (prepare) something special if I had known they were coming.
10. I can’t imagine what I would do with the money if I (win) the lottery.
11. If the rescue operation had been carried out quickly, the residents (save)
12. You would have known about the hurricane if you (watch) the 8.30 news.

2.Complete the sentences using the words in bold. Don’t change meanings of given words.

1. Mrs Allen’s neighbour searched his garden shed, and found the missing cat inside.

Hadn’t

If Mrs Allen’s neighbour ____ his garden shed, he _____ the missing cat inside.

1. The hikers were rescued quickly from the storm on the mountain because one of them had her mobile phone with her.

Wouldn’t

If one of the hikers ____ her mobile phone with her, they ____ rescued quickly from the storm on the mountain.

1. The boy who fell into the sea from the boat was wearing a life jacket, so he survived.

Wearing

If the boy who fell into the sea ___ a life jacket, he _____.

1. Mr Anderson woke up because he heard the smoke alarm, and the family managed to escape the fire.

Have

If Mr Anderson ___ because he heard the smoke alarm, the family ___ managed to escape the fire.

1. United didn’t win because the goalkeeper made a mistake in the last minute of the match.

Won

If the goalkeeper ____ a mistake in the last minute of the match, United ___.

1. Rescue workers didn’t search the car properly and didn’t notice the injured man.

Would

If rescue workers ___ the car properly, they ___ the injured man.

1. A police officer stopped Pratt for drink-driving, and took a DNA sample, which led to his being charged with the previously unsolved murder of Mrs Jones.

Have

If a police officer ___ Pratt for drink- driving, he ____ with the previously unsolved murder of Mrs Jones.

3. Put the verbs in brackets into a suitable form. Sometimes mixed conditionals are used.

The extinction of the dinosaurs

The dinosaurs probably became extinct after a giant asteroid hit the Earth about 65 million years ago. But what would have happened if this asteroid (1) ___ (miss)? Scientists believe that in this case, dinosaurs (2) ___ (continue) to dominate the Earth, and that modern animals (3) ___ (probably not exist). Instead of elephants and lions and so on, there (4) __ (be) different types of dinosaurs, because the animals we have now simply (5) ___ (be able) to evolve. Some scientists have even suggested that dinosaurs (6) ____ (develop) along the same lines as human beings, but this is a minority view. The general view is that perhaps dinosaur brains (7) ___ (grow) larger, but if they (8) ____ (exist) today, dinosaurs (9) ___ (not change) very much in general, and (10) ___ (look) much the same. The prospects for human beings would not be so good, however. If the asteroid (11) ___ (not collide) with the Earth, there (12) ___ (probably not be) any humans alive today. When the asteroid disaster wiped out the dinosaurs, it gave mammals the advantage. Without that space collision, mammals (13) ___ (not stand) much chance against the dominant dinosaur species.

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