Exercise 30: Fill in the blanks with the correct form of the verb in simple present perfect tense and indicate regular/irregular.

1. Charity has broken (irregular) her leg on the ski slope. Please dial 911. 2. The city has allowed (regular) residents to shoot off fireworks each year on the Fourth of July. 3. The lake has frozen (irregular) solid. Now we can go skating. 4. The sun has risen (irregular). It's time to get up. 5. The army has battled (regular) the enemy for two weeks. The soldiers are exhausted. 6. The principal has introduced (regular) the new teacher. She seems very nice. 7. Using his telescope, Jeremy has seen (irregular) other galaxies. He writes them on his blog. 8. The judge has listened (regular) to all of the evidence. Now he will make a ruling. 9. The strawberries have spoiled (regular). They should have been kept in the refrigerator. 10. The doctor has written (irregular) a book about disease prevention. It will be published soon.